Clean finished tasks by group name

[Mephistophiles]

Is your feature request related to a problem? Please describe.
I use pueue for a variety of purposes, for example I use separate group for send emails (every mail took 1-2 sedonds and pueue helps me a lot not to wait for the completion of all tasks). This group fills up very quickly with completed tasks that make it difficult to read the status command.

Describe the solution you'd like
Adding the option to clear only one group would have solved the problem (-g option) or add autoclear option to add command.

I'm ready to make a pull request if this functionality is useful.

[Nukesor]

A -g flag sounds good to me :)
Feel free to start working on this issue. You'll have to add a field to the message, that's being sent between the daemon and client. Hence, you have to extend the pueue-lib crate.

The next development cycle of pueue itself is done on the v1.1.0 branch. That branch uses the pueue-lib master branch until it's released, which makes it easy to develop both hand in hand.
Just make sure that your pueue PR's are branched of v1.1.0 and merged into v1.1.0 as well :)