feat:#60 added localization switch

frontend/src/store/localeStore.ts

@@ -0,0 +1,17 @@
+import { defineStore } from "pinia";
+import { useLocalStorage } from "@vueuse/core"
+
+const localeStore = defineStore("localeStore", {
+  state: () => {
+    return {
+      locale: useLocalStorage('locale', "en"), //useLocalStorage takes in a key of 'count' and default value of 0
+    };
+  },
+  actions: {
+    setLocale(locale: string) {
+      this.locale = locale;
+    },
+  },
+});
+
+export default localeStore;