Enhance install -u with ability to exclude an app and jump if error about fdroidcl

[mvdan]

It would be better to just not suggest upgrading apps which cannot be upgraded. Ideally we'd detect this if the signature is not the same, but if that is not possible, we could perhaps check which apps were installed via other stores.

[Linus789]

Implemented with https://github.com/mvdan/fdroidcl/releases/tag/v0.6.0.

[Mannshoch]

Best thanks @Linus789 for your Work 👍

[Mannshoch]

I recently had an interesting case where one app was not able to install. In the result the problem was the size of the app all other were small enough but this one app was too huge to install. Also in this case I got an exit status 1.I had not only to remove files on my device but also to force a media rescan. After that it worked.