Use comlink without vite-plugin-comlink

For some reason the vite-plugin-comlink doesn't seem to work in this
constellation.
I tried to reproduce in a new vite project and there it did work.
But also, the plugin does some horrible magic by replacing a
non-existant constructor `ComLinkWorker()` with the `wrap()` method
and then the only real benefit is, that we wouldn't need to write the
`expose()` method in the worker. So for that reason I'm removing the
plugin and using the comlink package directly.

app/package.json

@@ -69,7 +69,6 @@
     "@vitejs/plugin-react": "^4.0.2",
     "babel-plugin-formatjs": "^10.5.3",
     "typescript": "^4.9.5",
-    "vite": "^4.4.1",
-    "vite-plugin-comlink": "^3.0.5"
+    "vite": "^4.4.1"
   }
 }