remove(simpleanalytics): remove simple analytics for self hosted version

feat(fonts): replace google fonts with self-hosted fontsource packages

Add fontsource packages for all fonts previously loaded from Google Fonts.
Remove google fonts CDN links and update CSS to use local font imports.
This improves privacy by removing external dependencies and tracking.

package.json

@@ -39,6 +39,13 @@
     "vitest": "^3.2.4"
   },
   "dependencies": {
+    "@fontsource/cedarville-cursive": "^5.2.7",
+    "@fontsource/dancing-script": "^5.2.8",
+    "@fontsource/dm-sans": "^5.2.8",
+    "@fontsource/great-vibes": "^5.2.8",
+    "@fontsource/kalam": "^5.2.8",
+    "@fontsource/lato": "^5.2.7",
+    "@fontsource/merriweather": "^5.2.11",
     "@neslinesli93/qpdf-wasm": "^0.3.0",
     "@tailwindcss/vite": "^4.1.15",
     "blob-stream": "^0.1.3",