A native Android client with SAF DocumentProvider

[shaplyd]

https://developer.android.com/guide/topics/providers/document-provider

1. Allow Android apps to pick files stored on Copyparty via the standard Android document picker (SAF)
2. Allow apps to save files directly to Copyparty via document picker.

Currently you would be using a separate WebDav client such as
https://github.com/alexbakker/webdav-provider
https://play.google.com/store/apps/details?id=com.cxinventor.file.explorer

Without it, you need to download or upload the file separately and cannot use the system file picker in Android apps to access files stored in Copyparty. Selecting and saving files from apps require extra steps.

Integration as a Document Provider aligns with other cloud storage providers (Google Drive, Nextcloud, etc.), making it far more usable on Android.

So should there be a native copyparty client?