feat: Add centralized logging system with @link-stack/logger package

- Create new @link-stack/logger package wrapping Pino for structured logging
- Replace all console.log/error/warn statements across the monorepo
- Configure environment-aware logging (pretty-print in dev, JSON in prod)
- Add automatic redaction of sensitive fields (passwords, tokens, etc.)
- Remove dead commented-out logger file from bridge-worker
- Follow Pino's standard argument order (context object first, message second)
- Support log levels via LOG_LEVEL environment variable
- Export TypeScript types for better IDE support

This provides consistent, structured logging across all applications
and packages, making debugging easier and production logs more parseable.

package.json

@@ -62,21 +62,10 @@
     "typescript": "latest"
   },
   "overrides": {
-    "material-ui-popup-state": {
-      "react": "$react"
-    },
-    "@chatscope/chat-ui-kit-react": {
-      "react": "$react",
-      "react-dom": "$react-dom"
-    },
-    "@mui/icons-material": {
-      "react": "$react"
-    },
-    "mui-chips-input": {
-      "react": "$react",
-      "react-dom": "$react-dom",
-      "@types/react": "$@types/react"
-    }
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "@types/react": "^19.0.12",
+    "@mui/material": "^6.5.0"
   },
   "engines": {
     "npm": ">=10",