fix(cli): unify crewai run flow input resolution; prompt from state schema

`crewai run` resolved the configured [tool.crewai] flow, but `--inputs` was
hard-gated behind `--definition` and routed through a separate branch — the two
ways of pointing at the same flow didn't share resolution, and required inputs
were never detected, prompted, or validated (a missing field only blew up at
runtime).

Now inputs and definition come from one place:

- Remove the "--inputs requires --definition" gate (cli.py, run_crew.py,
  run_declarative_flow.py). `--inputs` alone resolves the configured flow,
  exactly like a bare `crewai run`; `--definition` is purely an override. The
  project-env re-exec forwards `--inputs` instead of rejecting it.
- Read the flow's state schema from the runtime Flow instance
  (`type(flow.state).model_json_schema()`), which is reliable for both inline
  `json_schema` and ref-imported `pydantic` state (the static definition's
  json_schema is None for the common ref case).
- Plain `crewai run` detects required state fields (minus those satisfied by
  state defaults) and prompts for them interactively, showing each field's
  description; skipped in non-interactive / CREWAI_DMN mode.
- Validate against the schema before kickoff: pointed
  "Missing required input 'x' — <description>" errors, and warn on unknown keys
  with a did-you-mean suggestion (catches typos like `prospect_emai`).

`--inputs` on a non-flow project now errors clearly ("only supported for
declarative flows") instead of the old confusing gate.

Tests: schema-driven prompt/validate/override paths, unknown-key warning,
defaults-satisfy-required, type validation, and re-exec input forwarding.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RBYGqJHC2TMC6fonFziuuh

lib/cli/tests/test_cli.py

@@ -151,12 +151,14 @@ def test_run_with_definition_uses_project_runner(run_crew, runner):
 
 
 @mock.patch("crewai_cli.cli.run_crew")
-def test_run_rejects_inputs_without_definition(run_crew, runner):
+def test_run_inputs_without_definition_calls_run_crew(run_crew, runner):
+    # --inputs no longer requires --definition; the resolution happens in run_crew.
     result = runner.invoke(run, ["--inputs", '{"topic":"AI"}'])
 
-    assert result.exit_code == 2
-    assert "Error: --inputs requires --definition" in result.output
-    run_crew.assert_not_called()
+    assert result.exit_code == 0
+    run_crew.assert_called_once_with(
+        trained_agents_file=None, definition=None, inputs='{"topic":"AI"}'
+    )
 
 
 @mock.patch("crewai_cli.cli.run_crew")