Add locale handling

src/main.ts

@@ -2,7 +2,15 @@ import { createApp } from "vue"
 import App from "./App.vue"
 import router from "./router"
 import "./assets/main.css"
+import { createI18n } from "vue-i18n";
+import { getLocale } from "./utilities/locale_handler";
 
 const app = createApp(App)
 app.use(router)
-app.mount("#app")
+app.use(createI18n({
+    legacy: false,
+    locale: getLocale(),
+    fallbackLocale: "it",
+    messages: { "en": {}, "it": {} },
+}));
+app.mount("#app")