feat: Major Chrome Extension overhaul with Click2Crawl, instant Schema extraction, and modular architecture

✨ New Features:
- Click2Crawl: Visual element selection with markdown conversion
  - Ctrl/Cmd+Click to select multiple elements
  - Visual text mode for WYSIWYG extraction
  - Real-time markdown preview with syntax highlighting
  - Export to .md file or clipboard

- Schema Builder Enhancement: Instant data extraction without LLMs
  - Test schemas directly in browser
  - See JSON results immediately
  - Export data or Python code
  - Cloud deployment ready (coming soon)

- Modular Architecture:
  - Separated into schemaBuilder.js, scriptBuilder.js, click2CrawlBuilder.js
  - Added contentAnalyzer.js and markdownConverter.js modules
  - Shared utilities and CSS reset system
  - Integrated marked.js for markdown rendering

🎨 UI/UX Improvements:
- Added edgy cloud announcement banner with seamless shimmer animation
- Direct, technical copy: "You don't need Puppeteer. You need Crawl4AI Cloud."
- Enhanced feature cards with emojis
- Fixed CSS conflicts with targeted reset approach
- Improved badge hover effects (red on hover)
- Added wrap toggle for code preview

📚 Documentation Updates:
- Split extraction diagrams into LLM and no-LLM versions
- Updated llms-full.txt with latest content
- Added versioned LLM context (v0.1.1)

🔧 Technical Enhancements:
- Refactored 3464 lines of monolithic content.js into modules
- Added proper event handling and cleanup
- Improved z-index management
- Better scroll position tracking for badges
- Enhanced error handling throughout

This release transforms the Chrome Extension from a simple tool into a powerful
visual data extraction suite, making web scraping accessible to everyone.

docs/md_v2/apps/crawl4ai-assistant/manifest.json

@@ -22,7 +22,16 @@
   "content_scripts": [
     {
       "matches": ["<all_urls>"],
-      "js": ["content/content.js"],
+      "js": [
+        "libs/marked.min.js",
+        "content/shared/utils.js",
+        "content/schemaBuilder.js",
+        "content/scriptBuilder.js",
+        "content/contentAnalyzer.js",
+        "content/markdownConverter.js",
+        "content/click2CrawlBuilder.js",
+        "content/content.js"
+      ],
       "css": ["content/overlay.css"],
       "run_at": "document_idle"
     }