feat: Implement DeepWiki documentation generation tools

- Added `__init__.py` in `codexlens/tools` for documentation generation.
- Created `deepwiki_generator.py` to handle symbol extraction and markdown generation.
- Introduced `MockMarkdownGenerator` for testing purposes.
- Implemented `DeepWikiGenerator` class for managing documentation generation and file processing.
- Added unit tests for `DeepWikiStore` to ensure proper functionality and error handling.
- Created tests for DeepWiki TypeScript types matching.

.claude/skills/team-ux-improve/wisdom/patterns/ui-feedback.md

@@ -0,0 +1,16 @@
+# UI Feedback Patterns
+
+## Loading States
+- Use skeleton loaders for content areas
+- Disable buttons during async operations
+- Show progress indicators for long operations
+
+## Error Handling
+- Display errors inline when possible
+- Provide actionable error messages
+- Allow retry for transient failures
+
+## Success Feedback
+- Toast notifications for non-critical successes
+- Inline confirmation for critical actions
+- Auto-dismiss non-critical notifications