feat(minimessage): add tag completions

[Rossterd]

Would close #654

[MiniDigger]

while I dont have time to look at this in detail rn, its a ton of code, we should have unit tests for it to verify that it works as expected.
this looks like great work tho!

[zml2008]

This is pretty hard to review when you've smashing in commits from another PR, please base it off one of the mainline branches (main/4 or main/5) instead.

Feels like there's quite a bit of duplication of parser logic in here as well, try to avoid that.

Is there a way to distinguish between "format" suggestions (so hints, that shouldn't be added to the cmdline literally such as "#RRGGBB") and value suggestions (such as, <c:r suggesting red), where you might want to actually tab-complete those into the command line?

[Rossterd]

Hey thanks for the response. yeah its probably not worth spending much time looking at this then. I will wait for main/5 to start successfully building and base it off that.

On the differentiation between hints and concrete suggestions: there is not. While bashing this together I mainly had Brigadier commands on my mind and I don't think those have any dynamic way of showing 'format' suggestions. I will add this (and the tests!) to the todo list for when I get to rebase this PR.