feat: add Figlet ASCII art generator as 7th tool

- Added Figlet tool with 373 fonts for ASCII art text generation
- Created new gradient-yellow-amber for terminal/retro aesthetic
- Updated Stats component from 6 to 7 tools
- Updated Footer badge to 7 tools and added Figlet link
- Added Figlet to README Available Tools section

Figlet Features:
- 373 curated fonts from xero/figlet-fonts collection
- Live preview and fuzzy search
- Multiple export formats (text, PNG, SVG, code snippets)
- Shareable URLs and keyboard shortcuts
- Perfect for ASCII banners, terminal art, and retro designs

Color: Yellow (#eab308) to Amber (#f59e0b) gradient
URL: https://figlet.kit.pivoine.art

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

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

components/ToolsGrid.tsx

@@ -86,6 +86,20 @@ const tools = [
       </svg>
     ),
   },
+  {
+    title: 'Figlet',
+    description: 'ASCII art text generator with 373 fonts. Create stunning text banners, terminal art, and retro designs with live preview and multiple export formats.',
+    url: 'https://figlet.kit.pivoine.art',
+    gradient: 'gradient-yellow-amber',
+    accentColor: '#eab308',
+    badges: ['373 Fonts', 'ASCII Art', 'Free'],
+    icon: (
+      <svg className="w-12 h-12 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
+        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 8h.01M15 8h.01" />
+      </svg>
+    ),
+  },
 ];
 
 export default function ToolsGrid() {