feat: Enhanced What's New feature with NON_TOOLS category and global footer

✨ What's New Feature & Navigation Improvements:
- Added attractive 'What's New' button to homepage with gradient design and sparkle effects
- Created NON_TOOLS category for better navigation organization (Home, What's New)
- Separated navigation items in sidebar and mobile menu with clear visual hierarchy
- Implemented unified global footer across all pages for consistency

🎨 Design Enhancements:
- Stunning gradient button with indigo→purple→pink colors and hover animations
- Perfect placement between stats and tools grid for maximum visibility
- Consistent indigo-purple theming for non-tools category
- Professional sparkle effects and scale transforms on hover

🔧 Technical Improvements:
- Removed duplicate footer from Terms of Service page
- Unified footer implementation reduces code duplication
- Enhanced mobile dropdown with proper NON_TOOLS separation
- Updated sidebar with category-based styling and separators

📁 Files Modified:
- /src/config/tools.js - Added NON_TOOLS category and What's New entry
- /src/components/ToolSidebar.js - Separated NON_TOOLS with visual hierarchy
- /src/components/Layout.js - Updated mobile menu and implemented global footer
- /src/pages/Home.js - Added attractive What's New button with animations
- /src/pages/TermsOfService.js - Removed duplicate footer
- /src/pages/ReleaseNotes.js - Updated with latest implementation details

src/App.js

@@ -13,6 +13,7 @@ import DiffTool from './pages/DiffTool';
 import TextLengthTool from './pages/TextLengthTool';
 import ObjectEditor from './pages/ObjectEditor';
 import TableEditor from './pages/TableEditor';
+import ReleaseNotes from './pages/ReleaseNotes';
 import TermsOfService from './pages/TermsOfService';
 import PrivacyPolicy from './pages/PrivacyPolicy';
 import { initGA } from './utils/analytics';
@@ -41,6 +42,7 @@ function App() {
             <Route path="/text-length" element={<TextLengthTool />} />
             <Route path="/object-editor" element={<ObjectEditor />} />
             <Route path="/table-editor" element={<TableEditor />} />
+            <Route path="/release-notes" element={<ReleaseNotes />} />
             <Route path="/privacy" element={<PrivacyPolicy />} />
             <Route path="/terms" element={<TermsOfService />} />
           </Routes>