chore: setup npm workspaces and plugin types as package

backend/plugins/jellyfin.plugin/package.json

@@ -1,7 +1,6 @@
 {
   "name": "jellyfin",
   "version": "1.0.0",
-  "description": "",
   "main": "src/index",
   "scripts": {
     "openapi:generate": "ts-node src/generate-openapi.ts",
@@ -13,7 +12,9 @@
     "@types/axios": "^0.14.4",
     "axios": "^1.7.8",
     "express-http-proxy": "^2.1.1",
-    "plugin-types": "file:../plugin-types",
+    "@aleksilassila/reiverr-plugin": "^1.0.0",
     "swagger-typescript-api": "^13.0.23"
-  }
-}
+  },
+  "devDependencies": {},
+  "description": ""
+}