websocket cursor data broadcast

package.json

@@ -32,7 +32,9 @@
     "@nestjs/core": "^11.0.1",
     "@nestjs/passport": "^11.0.5",
     "@nestjs/platform-express": "^11.0.1",
+    "@nestjs/platform-socket.io": "^11.1.9",
     "@nestjs/swagger": "^11.2.3",
+    "@nestjs/websockets": "^11.1.9",
     "@prisma/adapter-pg": "^7.0.0",
     "@prisma/client": "^7.0.0",
     "class-transformer": "^0.5.1",
@@ -43,7 +45,8 @@
     "passport-jwt": "^4.0.1",
     "pg": "^8.16.3",
     "reflect-metadata": "^0.2.2",
-    "rxjs": "^7.8.1"
+    "rxjs": "^7.8.1",
+    "socket.io": "^4.8.1"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",