Improve `pueue follow` behaviour with a task that does not yet have logs about pueue HOT 2 CLOSED

Hey :)

I implemented points 1. and 2. in the linked PR.

• If a task gets removed or doesn't exist in the first place, the exit code is now 1.
• If a task exists but didn't start yet, the client will wait for the task to start/finish instead of immediately exiting.

I see how this is an obvious UX improvement.

I'll have to write a few tests for this, since there're a few edge-case scenarios that I want test coverage for, but as far as I can see, it seems to work as expected. Feel free to check the branch.

from pueue.

I added some tests and I'm pretty confident that your requested change works as expected.

I'll go ahead and merge in the next few days, but it would be great if you could give this a test run.

from pueue.