feat: Merge PR #249 - Bootstrap skill with fixes and MCP optionality

Merged PR #249 from @MiaoDX with enhancements:

Bootstrap Feature:
- Self-bootstrap: Generate skill-seekers as Claude Code skill
- Robust frontmatter detection (dynamic line finding)
- SKILL.md validation (YAML + Markdown structure)
- Comprehensive error handling (uv check, permission checks)
- 6 E2E tests with venv isolation

MCP Optionality (User Feature):
- MCP removed from core dependencies
- Optional install: pip install skill-seekers[mcp]
- Lazy loading with helpful error messages
- Interactive setup wizard on first run
- Backward compatible

Bug Fixes:
- Fixed codebase_scraper.py AttributeError (line 1193)
- Fixed test_bootstrap_skill_e2e.py Path vs str issue
- Updated test version expectations to 2.7.0
- Added httpx to core (required for async scraping)
- Added anthropic to core (required for AI enhancement)

Testing:
- 6 new bootstrap E2E tests (all passing)
- 1207/1217 tests passing (99.2% pass rate)
- All bootstrap and enhancement tests pass
- Remaining failures are pre-existing test infrastructure issues

Documentation:
- Updated CHANGELOG.md with v2.7.0 notes
- Updated README.md with bootstrap and installation options
- Added setup wizard guide

Files Modified (9):
- CHANGELOG.md, README.md - Documentation updates
- pyproject.toml - MCP optional, httpx/anthropic core, markers, entry points
- scripts/bootstrap_skill.sh - Dynamic frontmatter, validation, error handling
- src/skill_seekers/cli/install_skill.py - Lazy MCP loading
- tests/test_cli_paths.py - Version 2.7.0
- uv.lock - Dependency updates

New Files (2):
- src/skill_seekers/cli/setup_wizard.py - Interactive installation guide (95 lines)
- tests/test_bootstrap_skill_e2e.py - E2E bootstrap tests (169 lines)

Credits: @MiaoDX for PR #249

Co-Authored-By: MiaoDX <MiaoDX@hotmail.com>
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/skill_seekers/cli/install_skill.py

@@ -34,12 +34,29 @@ from pathlib import Path
 # Add parent directory to path to import MCP server
 sys.path.insert(0, str(Path(__file__).parent.parent))
 
-# Import the MCP tool function
-from skill_seekers.mcp.server import install_skill_tool
+# Import the MCP tool function (with lazy loading)
+try:
+    from skill_seekers.mcp.server import install_skill_tool
+    MCP_AVAILABLE = True
+except ImportError:
+    MCP_AVAILABLE = False
+    install_skill_tool = None
 
 
 def main():
     """Main entry point for CLI"""
+    # Check MCP availability first
+    if not MCP_AVAILABLE:
+        print("\n❌ Error: MCP package not installed")
+        print("\nThe 'install' command requires MCP support.")
+        print("Install with:")
+        print("  pip install skill-seekers[mcp]")
+        print("\nOr use these alternatives:")
+        print("  skill-seekers scrape --config react")
+        print("  skill-seekers package output/react/")
+        print()
+        sys.exit(1)
+
     parser = argparse.ArgumentParser(
         description="Complete skill installation workflow (fetch → scrape → enhance → package → upload)",
         formatter_class=argparse.RawDescriptionHelpFormatter,