Recommend a plugin to resolve expired GPG keys

[FrostyX]

Fix #2156

[FrostyX]

I wanted to kick this off. We can figure out a better error message or a better place in the code here.

The output now looks like this:

The GPG keys listed for the "Copr repo for neovim-nightly owned by agriffis" repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.. Failing package is: libtree-sitter-0.24.1~git.130.ge445532a-1.fc41.x86_64
 GPG Keys are configured as: https://download.copr.fedorainfracloud.org/results/agriffis/neovim-nightly/pubkey.gpg
Public key for neovim-0.11.0~dev.1267.gc1378413c-1.fc41.x86_64.rpm is not trusted. Failing package is: neovim-0.11.0~dev.1267.gc1378413c-1.fc41.x86_64
 GPG Keys are configured as: https://download.copr.fedorainfracloud.org/results/agriffis/neovim-nightly/pubkey.gpg
Public key for utf8proc-2.9.0+git.11.g3de4596-59.fc41.x86_64.rpm is not trusted. Failing package is: utf8proc-2.9.0+git.11.g3de4596-59.fc41.x86_64
 GPG Keys are configured as: https://download.copr.fedorainfracloud.org/results/agriffis/neovim-nightly/pubkey.gpg

Use the `--enableplugin=expired-pgp-keys' paremeter to resolve the problem.

The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
Error: GPG check FAILED

[purpleidea]

parameter*

[FrostyX]

Ah, thank you :-)

[FrostyX]

bump

[jan-kolarik]

Hey @FrostyX, sorry for late response, I've tried to improve the proposed behavior a bit. It's mainly about narrowing the cases when the suggestion message is shown and also a slight modification of the message. Please check it and I can then adjust the commits to the final state.