feat(guild-realtime): add websocket gateway with api-key auth and channel rooms

Fabric.Backend.Guild/package.json

@@ -17,13 +17,16 @@
     "@nestjs/common": "^10.4.8",
     "@nestjs/core": "^10.4.8",
     "@nestjs/platform-express": "^10.4.8",
+    "@nestjs/platform-socket.io": "^10.4.22",
     "@nestjs/swagger": "^7.4.2",
     "@nestjs/typeorm": "^11.0.1",
+    "@nestjs/websockets": "^10.4.22",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.15.1",
     "mysql2": "^3.22.3",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1",
+    "socket.io": "^4.8.3",
     "swagger-ui-express": "^5.0.1",
     "typeorm": "^0.3.29"
   },