feat: add new themes, Zed fonts, and sort theme/font lists

New themes added:
- Dark: Ayu Dark, Ayu Mirage, Ember, Matcha
- Light: Ayu Light, One Light, Bluloco, Feather

Other changes:
- Bundle Zed Sans and Zed Mono fonts from zed-industries/zed-fonts
- Sort font options alphabetically (default first)
- Sort theme options alphabetically (Dark/Light first)
- Improve Ayu Dark text contrast for better readability
- Fix Matcha theme to have green undertone instead of blue

package.json

@@ -62,6 +62,13 @@
     ]
   },
   "dependencies": {
+    "@fontsource/cascadia-code": "^5.2.3",
+    "@fontsource/iosevka": "^5.2.5",
+    "@fontsource/lato": "^5.2.7",
+    "@fontsource/montserrat": "^5.2.8",
+    "@fontsource/playfair-display": "^5.2.8",
+    "@fontsource/raleway": "^5.2.8",
+    "@fontsource/source-sans-3": "^5.2.9",
     "cross-spawn": "7.0.6",
     "rehype-sanitize": "6.0.0",
     "tree-kill": "1.2.2"