add whisper download utils. add react-navigator.

app/i18n/api.ts

@@ -1,6 +1,7 @@
 import { Cache } from "react-native-cache";
 import { LIBRETRANSLATE_BASE_URL } from "@/constants/api";
 import AsyncStorage from '@react-native-async-storage/async-storage';
+import { Settings } from "../lib/settings";
 
 type language_t = string;
 
@@ -51,6 +52,11 @@ export class LanguageServer {
             throw new Error(`Can't extract values from data: ${JSON.stringify(data)}`)
         }
     }
+
+    static async getDefault() {
+        const settings = await Settings.getDefault();
+        return new LanguageServer(await settings.getLibretranslateBaseUrl());
+    }
 }
 
 export class Translator {