Move Google calendar import to Nextjs

frontend/package.json

@@ -17,7 +17,6 @@
     "@vercel/analytics": "^1.0.1",
     "accept-language": "^3.0.18",
     "chroma.ts": "^1.0.10",
-    "gapi-script": "^1.2.0",
     "hue-map": "^1.0.0",
     "i18next": "^22.5.1",
     "i18next-browser-languagedetector": "^7.0.2",
@@ -33,6 +32,9 @@
     "zustand": "^4.3.8"
   },
   "devDependencies": {
+    "@types/gapi": "^0.0.44",
+    "@types/gapi.calendar": "^3.0.6",
+    "@types/google.accounts": "^0.0.7",
     "@types/node": "^20.2.5",
     "@types/react": "^18.2.9",
     "@types/react-dom": "^18.2.4",