feat: migrate to vue 3 (#2689)

---------

Co-authored-by: Joep <jcbuhre@gmail.com>
Co-authored-by: Omar Hussein <omarmohammad1951@gmail.com>
Co-authored-by: Oleg Lobanov <oleg@lobanov.me>

frontend/src/stores/router.ts

@@ -0,0 +1,14 @@
+import { defineStore } from "pinia";
+
+/**
+ * Dummy store for exposing router to be used in other stores
+ * @example
+ *  // route: () => {
+ *  //   const routerStore = useRouterStore();
+ *  //   return routerStore.router.currentRoute;
+ *  // },
+ */
+export const useRouterStore = defineStore("routerStore", () => {
+  // can be an empty definition
+  return {};
+});