🚨(y-provider) upgrade eslint to v9 with y-provider server

We upgraded ESLint to version 9 in the y-provider server,
which includes several improvements and fixes.
This change also involves updating the ESLint
configuration files to the new format and ensuring
compatibility with the latest ESLint features.

src/frontend/servers/y-provider/tsconfig.json

@@ -21,6 +21,6 @@
     "resolveFullPaths": true,
     "verbose": false
   },
-  "include": ["**/*.ts"],
+  "include": ["**/*.ts", "**/*.mjs"],
   "exclude": ["node_modules"]
 }