Future plans for piv-agent: ditching gpg

[smlx]

I no longer really need gpg support. It is poorly documented, annoying to develop against, breaks in minor version updates, and has all kinds of sharp edges as a user. Cryptographically it is considered anachronistic and bad news all round.

I currently use pass but would like to switch to passage. So my plan is to drop gpg support and instead implement an age plugin as described in #134.

I don't have a lot of free time at the moment so this is not going to happen anytime soon. However I wanted to announce this plan in case anyone was thinking of depending on piv-agent's gpg-agent support. Please don't, because it will be going away in future. 🙂