refactor: migrate from firebase to vercel

apps/main/package.json

@@ -20,7 +20,7 @@
         "@fontsource/noto-sans-kr": "^5.0.5",
         "@inqling/svelte-icons": "^4.0.2",
         "@playwright/test": "^1.36.2",
-        "@sveltejs/adapter-static": "^3.0.1",
+        "@sveltejs/adapter-vercel": "^5.3.0",
         "@sveltejs/kit": "^2.0.6",
         "@sveltejs/vite-plugin-svelte": "^3.0.1",
         "@types/jest": "^29.5.11",