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/popup/popup.css

@@ -145,6 +145,10 @@ header h1 {
   background: #3a1e5f;
 }
 
+.mode-button.c2c .icon {
+  background: #1e5f3a;
+}
+
 .mode-info h3 {
   font-size: 16px;
   color: #fff;

docs/md_v2/apps/crawl4ai-assistant/popup/popup.html

@@ -37,6 +37,14 @@
           <p>Record actions to build automation scripts</p>
         </div>
       </button>
+      
+      <button id="c2c-mode" class="mode-button c2c">
+        <div class="icon">✨</div>
+        <div class="mode-info">
+          <h3>Click2Crawl</h3>
+          <p>Select elements and convert to clean markdown</p>
+        </div>
+      </button>
     </div>
     
     <div id="active-session" class="active-session hidden">

docs/md_v2/apps/crawl4ai-assistant/popup/popup.js

@@ -22,6 +22,10 @@ document.addEventListener('DOMContentLoaded', () => {
     startScriptCapture();
   });
 
+  document.getElementById('c2c-mode').addEventListener('click', () => {
+    startClick2Crawl();
+  });
+
   // Session actions
   document.getElementById('generate-code').addEventListener('click', () => {
     generateCode();
@@ -79,6 +83,19 @@ function startScriptCapture() {
   });
 }
 
+function startClick2Crawl() {
+  chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
+    chrome.tabs.sendMessage(tabs[0].id, {
+      action: 'startClick2Crawl'
+    }, (response) => {
+      if (response && response.success) {
+        // Close the popup to let user interact with the page
+        window.close();
+      }
+    });
+  });
+}
+
 function showActiveSession(stats) {
   document.querySelector('.mode-selector').style.display = 'none';
   document.getElementById('active-session').classList.remove('hidden');