feat: add iframe widget (#291)

* feat: add nestjs replacement, remove nestjs

* feat: add iframe widget

* fix: format issue

* fix: format issue

* fix: format issue

* fix: lockfile frozen

apps/nextjs/package.json

@@ -67,7 +67,6 @@
     "@types/react": "^18.2.76",
     "@types/react-dom": "^18.2.25",
     "@types/chroma-js": "2.4.4",
-    "dotenv-cli": "^7.4.1",
     "concurrently": "^8.2.2",
     "eslint": "^8.57.0",
     "prettier": "^3.2.5",