feat(favicon,repair-pdf): Add favicon support and implement PDF repair tool

- Add favicon.ico to public directory for browser tab display
- Update favicon references across all HTML pages with proper link tags for SVG, PNG, and ICO formats
- Add Apple touch icon support for iOS devices
- Create new repair-pdf.ts logic module for PDF repair functionality
- Create new repair-pdf-page.ts utility module for page-level repair operations
- Add repair-pdf.html page with UI for PDF repair tool
- Register repair PDF tool in tools configuration and PDF tools registry
- Update UI rendering utilities to support new repair tool
- Improve favicon handling with multiple format fallbacks for cross-browser compatibility
- Standardize favicon paths to use absolute URLs for consistency
- Clean up whitespace and formatting in licensing.html for code consistency

src/js/config/tools.ts

@@ -468,6 +468,12 @@ export const categories = [
         subtitle:
           'Remove password protection and security restrictions associated with digitally signed PDF files.',
       },
+      {
+        href: '/src/pages/repair-pdf.html',
+        name: 'Repair PDF',
+        icon: 'wrench',
+        subtitle: 'Recover data from corrupted or damaged PDF files.',
+      },
     ],
   },
   {