[#61511] Implement initial list timeentries command

[myabc]

https://community.openproject.org/wp/61511

An initial patch to support listing (personal) time entries. I wrote this to "scratch an itch" - and make my own time tracking easier.

Obviously full CRUD would be nice, but this is just a start.

Also, since this is the first go code I've written, please forgive if it not idiomatic!

[Kharonus]

Nice ❤️ thanks for your idea and effort. I'd love to put this into code after shaping it up a little bit

[myabc]

@Kharonus I spent a few minutes switching to the new filter implementation. Ideally, we'd also add some tests for the filters but I'm going to park this for now and let you review.

Also, lists of users should work, e.g.:

/openproject-cli list timeentries -u 39999,me
/openproject-cli list timeentries -u 39812,39999

Although the validation regexp (copied from core) allows login names, I can't actually get this to work - neither for time entries nor work packages.:

/openproject-cli list timeentries -u [email protected]
/openproject-cli list workpackages -a [email protected]

I double-checked the URL escaping and that appears to be correct, so I am guessing we're using the API in an unsupported way?

[Kharonus]

Nice work

looks fine for me to get this merged. We might polish it a bit, once we add more filters or the other CRUD methods, but overall, job well done.

the one minor thing remains, except that