Optimize all framework configs with start_urls for better coverage

All configs now follow the steam-economy-complete.json pattern with:
- Multiple start_urls for comprehensive entry points
- Improved include patterns for better targeting
- Enhanced exclude patterns to skip irrelevant pages

Godot Config:
- Added 7 start_urls covering getting started, scripting, 2D, 3D, physics, animation, and classes
- Added include patterns: /getting_started/, /tutorials/, /classes/
- More focused scraping of core documentation

React Config:
- Added 6 start_urls covering learn, quick-start, reference, and hooks
- Existing patterns maintained (already well-optimized)

Vue Config:
- Added 6 start_urls covering introduction, essentials, components, composables, and API
- Fixed base_url from https://vuejs.org/guide/ to https://vuejs.org/
- Added /partners/ to exclude list

Django Config:
- Added 7 start_urls covering intro, models, views, templates, forms, auth, and reference
- Added /intro/ to include patterns
- Added /releases/ to exclude list (changelog not needed)

FastAPI Config:
- Added 7 start_urls covering tutorial, first-steps, path-params, body, dependencies, advanced, and reference
- Added /deployment/ to exclude list

Benefits:
- Better initial page discovery
- More comprehensive documentation coverage
- Faster scraping (direct entry to important sections)
- Reduced unnecessary page crawling
- Consistent pattern across all configs

All configs tested and validated:
✅ 71/71 tests passing
✅ All 6 configs validated successfully

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

configs/react.json

@@ -2,6 +2,14 @@
   "name": "react",
   "description": "React framework for building user interfaces. Use for React components, hooks, state management, JSX, and modern frontend development.",
   "base_url": "https://react.dev/",
+  "start_urls": [
+    "https://react.dev/learn",
+    "https://react.dev/learn/quick-start",
+    "https://react.dev/learn/thinking-in-react",
+    "https://react.dev/reference/react",
+    "https://react.dev/reference/react-dom",
+    "https://react.dev/reference/react/hooks"
+  ],
   "selectors": {
     "main_content": "article",
     "title": "h1",