feat: replace ky with better-fetch for API requests

package.json

@@ -16,6 +16,7 @@
   },
   "license": "MIT",
   "dependencies": {
+    "@better-fetch/fetch": "^1.1.18",
     "@elron/svelte-audio-store": "1.0.0",
     "@number-flow/svelte": "^0.3.9",
     "@tailwindcss/typography": "0.5.16",
@@ -28,7 +29,6 @@
     "buffer": "^6.0.3",
     "crypto": "^1.0.1",
     "crypto-js": "^4.2.0",
-    "ky": "1.8.1",
     "lucide-svelte": "0.523.0",
     "osu-classes": "3.1.0",
     "osu-parsers": "4.1.7",