Add gpg

I haven't chosen what pinentry to use, so for now I've set it to
curses, which should make it useable while we look for a proper
solution

Additionally, when git is set to gpg sign by default we need to install
gpg so this change also auto-enables gpg when git wants to sign with it

Change-Id: Ic8fafb1d2ece87f6ccff22241b7e3fc0c9d1c2e0
Reviewed-on: https://git.clicks.codes/c/Chimera/NixFiles/+/402
Tested-by: Skyler Grey <minion@clicks.codes>
Reviewed-by: Samuel Shuert <coded@clicks.codes>
3 files changed