feat: adopt directory-based docs versioning with Edge channel

Switch docs.crewai.com from navigation-only versioning (every version
selector entry rendered the same docs/<lang>/* source files) to
Mintlify's directory-based versioning so each version selector entry
renders its own snapshot. Add an "Edge" channel under docs/edge/<lang>/*
that always reflects main HEAD for unreleased work, eliminating
pre-release leakage onto frozen release labels. External links to
canonical /<lang>/* URLs are preserved via wildcard redirects that
always land on the current default version.

Layout:
- docs/edge/<lang>/*         rolling source (you edit here)
- docs/edge/enterprise-api.*.yaml
- docs/v<X.Y.Z>/<lang>/*     frozen, immutable snapshots
- docs/v<X.Y.Z>/enterprise-api.*.yaml
- docs/images/               shared, append-only
- docs/docs.json             nav + redirects

URLs follow the Mintlify-idiomatic shape: /edge/<lang>/<page> for
Edge, /v<X.Y.Z>/<lang>/<page> for every frozen snapshot. The wildcard
redirects /<lang>/:slug* -> /<default>/<lang>/:slug* keep stale links
working, and every freeze rewrites them (plus all per-section/per-page
redirects) so destinations always resolve to the current default
without depending on a second redirect hop.

Release flow integration (devtools release):
- New module crewai_devtools.docs_versioning.freeze() materialises
  docs/v<X.Y.Z>/ from docs/edge/, rewrites openapi: refs inside the
  snapshot, inserts the version into every language block in
  docs.json, and refreshes all redirect destinations.
- _update_docs_and_create_pr() in cli.py now calls that freeze during
  Phase 2 of devtools release. Edge changelogs are updated first (so
  the snapshot freeze picks them up), then the snapshot is staged
  alongside docs.json, branched as docs/freeze-v<X.Y.Z>, and the PR
  is titled [docs-freeze] docs: snapshot and changelog for v<X.Y.Z>
  — the title prefix the new CI guard reads.
- The PR still gates tag, GitHub release, PyPI publish, and the
  enterprise release as before; no new PRs are added.
- Pre-releases (1.X.YaN, 1.X.YbN, ...) skip the snapshot — they ride
  Edge — and the docs PR title omits the [docs-freeze] prefix.
- docs_check (AI-generated docs scaffolding) writes to
  docs/edge/<lang>/* so newly-generated unreleased docs land in Edge
  and never accidentally touch a frozen snapshot.

Migration scripts (one-shot):
- scripts/docs/freeze_historical_versions.py reconstructs all 16
  historical snapshots (v1.10.0 .. v1.14.7) from git tags via
  git archive | tar, rewriting openapi: MDX refs so each snapshot
  reads its own enterprise-api YAML rather than the live one.
- scripts/docs/prefix_version_paths.py one-shot-migrates docs.json:
  rewrites every page path in 16 versioned blocks to point under
  docs/v<X.Y.Z>/, inserts a new Edge entry per language, tags
  v1.14.7 as Latest (default), prunes pages whose target file
  doesn't exist in the snapshot (e.g. docs/ar/ didn't exist before
  v1.12.0), and writes the wildcard + per-section redirects.
- scripts/docs/freeze_current_edge.py is now a thin CLI wrapper
  around docs_versioning.freeze for manual one-off freezes (e.g.
  retroactively snapshotting a forgotten release).

CI guards (.github/workflows/docs-snapshots.yml):
- Frozen snapshots under docs/v[0-9]*/ are immutable; only PRs whose
  title contains [docs-freeze] (i.e. release-cut PRs generated by
  devtools release or the manual wrapper) may modify them.
- Images under docs/images/ are append-only since snapshots share a
  single image directory. Deleting or renaming an image breaks every
  historical snapshot that still references it.

Restored docs/images/crewai-otel-export.png from PR #3673; it was
deleted in PR #4908 but v1.10.0 / v1.10.1 snapshots still reference
it. Restoring instead of editing the snapshots preserves historical
rendering fidelity and validates the new append-only rule
retroactively.

Tests:
- lib/devtools/tests/test_docs_versioning.py covers the freeze: file
  copy, openapi rewrite, version insertion, default demotion, redirect
  upserts, per-section redirect rewriting, idempotency, and invalid
  inputs.

Verified locally with mintlify broken-links: 0 broken links across
the full site (Edge + 16 frozen versions, 4 locales).

AGENTS.md (repo root) is the contributor guide for the new model;
RELEASING.md is the release-cut runbook; README's Contribution
section links to both.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/docs/freeze_historical_versions.py

@@ -0,0 +1,184 @@
+#!/usr/bin/env python3
+"""Freeze historical doc versions from git tags.
+
+For each release tag listed in ``HISTORICAL_TAGS`` this script extracts the
+``docs/en``, ``docs/pt-BR``, ``docs/ko``, ``docs/ar`` directories and the
+``docs/enterprise-api.*.yaml`` files at that tag and writes them under
+``docs/v<tag>/``. Files that did not yet exist at a given tag are silently
+skipped (older tags simply produce smaller snapshots).
+
+Top-level ``docs/v<tag>/`` folders are the Mintlify-idiomatic layout: the
+folder name appears verbatim in the URL (``/v1.14.7/en/concepts/agents``),
+matching the official versioning examples.
+
+Idempotent: if ``docs/v<tag>/`` already exists the tag is skipped unless
+``--force`` is passed.
+
+Usage::
+
+    python scripts/docs/freeze_historical_versions.py
+    python scripts/docs/freeze_historical_versions.py --tag 1.14.7
+    python scripts/docs/freeze_historical_versions.py --force
+"""
+
+from __future__ import annotations
+
+import argparse
+from pathlib import Path
+import re
+import shutil
+import subprocess
+import sys
+
+
+HISTORICAL_TAGS: list[str] = [
+    "1.10.0",
+    "1.10.1",
+    "1.11.0",
+    "1.11.1",
+    "1.12.0",
+    "1.12.1",
+    "1.12.2",
+    "1.13.0",
+    "1.14.0",
+    "1.14.1",
+    "1.14.2",
+    "1.14.3",
+    "1.14.4",
+    "1.14.5",
+    "1.14.6",
+    "1.14.7",
+]
+
+SNAPSHOT_PATHS: list[str] = [
+    "docs/en",
+    "docs/pt-BR",
+    "docs/ko",
+    "docs/ar",
+    "docs/enterprise-api.base.yaml",
+    "docs/enterprise-api.en.yaml",
+    "docs/enterprise-api.ko.yaml",
+    "docs/enterprise-api.pt-BR.yaml",
+]
+
+
+def _repo_root() -> Path:
+    out = subprocess.run(
+        ["git", "rev-parse", "--show-toplevel"],
+        check=True,
+        capture_output=True,
+        text=True,
+    ).stdout.strip()
+    return Path(out)
+
+
+def _tag_exists(tag: str) -> bool:
+    rc = subprocess.run(
+        ["git", "rev-parse", "--verify", f"refs/tags/{tag}"],
+        capture_output=True,
+    ).returncode
+    return rc == 0
+
+
+def _paths_present_at_tag(tag: str, paths: list[str]) -> list[str]:
+    present: list[str] = []
+    for path in paths:
+        rc = subprocess.run(
+            ["git", "cat-file", "-e", f"{tag}:{path}"],
+            capture_output=True,
+        ).returncode
+        if rc == 0:
+            present.append(path)
+    return present
+
+
+def freeze_version(tag: str, *, force: bool = False) -> None:
+    root = _repo_root()
+    target = root / "docs" / f"v{tag}"
+
+    if target.exists():
+        if not force:
+            print(f"  skip v{tag} (already frozen at docs/v{tag}/)")
+            return
+        shutil.rmtree(target)
+
+    if not _tag_exists(tag):
+        print(f"  WARN tag {tag} not found, skipping", file=sys.stderr)
+        return
+
+    paths = _paths_present_at_tag(tag, SNAPSHOT_PATHS)
+    if not paths:
+        print(f"  WARN no snapshot paths exist at tag {tag}, skipping", file=sys.stderr)
+        return
+
+    target.mkdir(parents=True, exist_ok=True)
+
+    # git archive emits paths verbatim (e.g. docs/en/concepts/agents.mdx).
+    # tar --strip-components=1 removes the leading `docs/` segment so the
+    # extracted layout under `target` matches `docs/versions/v<tag>/en/...`.
+    archive = subprocess.Popen(
+        ["git", "archive", "--format=tar", tag, *paths],
+        cwd=root,
+        stdout=subprocess.PIPE,
+    )
+    untar = subprocess.Popen(
+        ["tar", "-x", "--strip-components=1", "-C", str(target)],
+        stdin=archive.stdout,
+    )
+    assert archive.stdout is not None
+    archive.stdout.close()
+    untar_rc = untar.wait()
+    archive_rc = archive.wait()
+    if archive_rc != 0 or untar_rc != 0:
+        raise RuntimeError(
+            f"git archive {tag} failed (archive_rc={archive_rc}, tar_rc={untar_rc})"
+        )
+
+    _rewrite_openapi_refs(target, tag)
+
+    file_count = sum(1 for p in target.rglob("*") if p.is_file())
+    print(f"  froze v{tag} -> docs/v{tag}/ ({file_count} files)")
+
+
+# API Reference MDX files reference the OpenAPI spec via an absolute docs-site
+# path (e.g. ``openapi: "/enterprise-api.en.yaml GET /foo"``). When a page is
+# served from a snapshot we need that path to point at the snapshot's own copy
+# of the YAML, otherwise every frozen version would render against the latest
+# spec.
+_OPENAPI_PATTERN = re.compile(r'(openapi:\s*"\s*)/(enterprise-api\.[^"\s]+\.yaml)')
+
+
+def _rewrite_openapi_refs(target: Path, tag: str) -> None:
+    prefix = f"v{tag}"
+    for mdx in target.rglob("*.mdx"):
+        text = mdx.read_text(encoding="utf-8")
+        new_text, n = _OPENAPI_PATTERN.subn(rf'\1/{prefix}/\2', text)
+        if n:
+            mdx.write_text(new_text, encoding="utf-8")
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument(
+        "--tag",
+        action="append",
+        default=None,
+        help="Limit to a specific tag (repeatable). Default: all historical tags.",
+    )
+    parser.add_argument(
+        "--force",
+        action="store_true",
+        help="Overwrite existing snapshot directories.",
+    )
+    args = parser.parse_args()
+
+    tags = args.tag or HISTORICAL_TAGS
+    print(f"Freezing {len(tags)} historical version(s)...")
+    for tag in tags:
+        freeze_version(tag, force=args.force)
+    print("Done.")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())