feat(android app): add 'choose file' button to auto upload media to catbox in the background

more free and open web hosting services can be added later

src/plugins/file-uploader.ts

@@ -0,0 +1,9 @@
+import { registerPlugin } from '@capacitor/core';
+
+export interface FileUploaderPlugin {
+  pickAndUploadMedia(): Promise<{ url: string; fileName: string }>;
+}
+
+const FileUploader = registerPlugin<FileUploaderPlugin>('FileUploader');
+
+export default FileUploader;