feat: merge latest changes from crewAI-tools main into packages/tools

- Merged upstream changes from crewAI-tools main branch
- Resolved conflicts due to monorepo structure (crewai_tools -> src/crewai_tools)
- Removed deprecated embedchain adapters
- Added new RAG loaders and crewai_rag_adapter
- Consolidated dependencies in pyproject.toml

Fixed critical linting issues:
- Added ClassVar annotations for mutable class attributes
- Added timeouts to requests calls (30s default)
- Fixed exception handling with proper 'from' clauses
- Added noqa comments for public API functions (backward compatibility)
- Updated ruff config to ignore expected patterns:
  - F401 in __init__ files (intentional re-exports)
  - S101 in test files (assertions are expected)
  - S607 for subprocess calls (uv/pip commands are safe)

Remaining issues are from upstream code and will be addressed in separate PRs.

pyproject.toml

@@ -78,10 +78,17 @@ select = [
     "I001",   # sort imports
     "I002",   # remove unused imports
 ]
-ignore = ["E501"]  # ignore line too long
+ignore = [
+    "E501",  # ignore line too long
+    "S607",  # Starting a process with a partial executable path - OK for uv/pip commands
+]
 
 [tool.ruff.lint.per-file-ignores]
 "tests/**/*.py" = ["S101"]  # Allow assert statements in tests
+"packages/*/tests/**/*.py" = ["S101"]  # Allow assert statements in tests
+"**/*_test.py" = ["S101"]  # Allow assert statements in test files
+"**/test_*.py" = ["S101"]  # Allow assert statements in test files
+"**/__init__.py" = ["F401"]  # Allow unused imports in __init__ files (re-exports)
 
 [tool.pytest.ini_options]
 testpaths = [