feat: add about page, global stats counter, and blitz screen updates

- Create about page with game modes, technologies, and paliers
- Add stats API endpoint for global game counter
- Update home screen with emoji-based tier system (🌱-🚀)
- Rewrite BlitzScreen to match new puzzle-based win/lose phases
- Add simple-icons package for tech stack icons
- Update metadata with wikirush.xyz domain
- Fix em dashes to hyphens throughout codebase
- Update footer with privacy and about links

package.json

@@ -15,7 +15,8 @@
     "next": "16.2.3",
     "next-auth": "5.0.0-beta.30",
     "react": "19.2.4",
-    "react-dom": "19.2.4"
+    "react-dom": "19.2.4",
+    "simple-icons": "^16.15.0"
   },
   "devDependencies": {
     "@prisma/adapter-better-sqlite3": "^7.7.0",