⬇️(dependency) downgrade typescript to v6.0.3

We are downgrading TypeScript from version 7.0.2
to 6.0.3.
To bump the version of TypeScript, we will need
to update the codebase to be compatible with the
new version.

src/frontend/package.json

@@ -44,7 +44,7 @@
     "react": "19.2.7",
     "react-dom": "19.2.7",
     "serialize-javascript": "7.0.7",
-    "typescript": "7.0.2",
+    "typescript": "6.0.3",
     "wrap-ansi": "10.0.0",
     "yjs": "13.6.31"
   },