refactor: finalize standalone services cleanup

- Remove root pnpm-lock.yaml (stale monorepo lockfile)
- Rename root package from bete-monorepo to bete
- Clean up root scripts to use cd instead of pnpm --prefix
- Remove ignoreScripts/trustedDependencies from frontend package.json
- Optimize Dockerfiles with multi-stage builds and proper layer caching
- Update .dockerignore to exclude build artifacts
- Remove leftover pnpm test config file from frontend

services/frontend/package.json

@@ -41,13 +41,5 @@
     "babel-plugin-react-compiler": "1.0.0",
     "tailwindcss": "^4",
     "typescript": "^5"
-  },
-  "ignoreScripts": [
-    "sharp",
-    "unrs-resolver"
-  ],
-  "trustedDependencies": [
-    "sharp",
-    "unrs-resolver"
-  ]
+  }
 }