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/Footer.tsx

@@ -24,7 +24,7 @@ export default function Footer() {
               Your Creative Toolkit
             </p>
             <div className="mt-4 inline-flex items-center gap-2 px-3 py-1 rounded-full bg-purple-500/10 border border-purple-500/20">
-              <span className="text-xs font-medium text-purple-400">6 Tools</span>
+              <span className="text-xs font-medium text-purple-400">7 Tools</span>
               <span className="text-gray-600">•</span>
               <span className="text-xs text-gray-500">Open Source</span>
             </div>
@@ -66,6 +66,7 @@ export default function Footer() {
               <a href="https://stirling.kit.pivoine.art" className="text-gray-400 hover:text-[#667eea] transition-colors text-base">Stirling</a>
               <a href="https://units.kit.pivoine.art" className="text-gray-400 hover:text-[#2dd4bf] transition-colors text-base">Units</a>
               <a href="https://draw.kit.pivoine.art" className="text-gray-400 hover:text-[#ec4899] transition-colors text-base">Draw</a>
+              <a href="https://figlet.kit.pivoine.art" className="text-gray-400 hover:text-[#eab308] transition-colors text-base">Figlet</a>
             </div>
           </div>
         </motion.div>