UI overhaul for setup view

[sunkup]

More or less what @devvv4ever created as a Mockup.

What do you think? @ArnyminerZ

[ArnyminerZ]

Everything looks and works great. The only thing that I'd add, now that we are into it, is displaying a more "user friendly" name when we pick a file.

I have this snippet for example:

String[] projection = {MediaStore.MediaColumns.DISPLAY_NAME};
Cursor metaCursor = cr.query(uri, projection, null, null, null);
if (metaCursor != null) {
    try {
        if (metaCursor.moveToFirst()) {
            fileName = metaCursor.getString(0);
        }
    } finally {
        metaCursor.close();
    }
}

I think it would be much better than directly showing content://...

However, if you think the current implementation is enough, I can work with it 😄

[sunkup]

Nice idea. I have added it now. I would have liked to compute the filename from the url in the viewmodel, but we'd need to pass context or content resolver which is discouraged. This will become cleaner once we use Kotlin flows and compose state anyways, I guess.

[ArnyminerZ]

I've just merged with the main branch, everything seems to work fine.
You can merge if it looks good to you