feat: 3 sections in show refs screen: branches, remotes, tags

[golden-expiriensu]

Resolves: https://github.com/altsem/gitu/issues/125

[golden-expiriensu]

@altsem PTAL, can I start writing some tests or you would like me to change something (not sure if current approach is the best one)

[golden-expiriensu]

This is how it looks when every section uses its dedicated style, what do you think?

[altsem]

It is a first step at least :+1: One thing, I noticed that both the remote and the local branch are prefixed with a *. If I checkout a remote branch, a local branch would still have a *, even though the HEAD is detached.

[golden-expiriensu]

Okay, this should be much better now:

Remotes section is now segregated by the prefix before first slash (origin/main -> origin, text-text/main -> text-text) where header is capitalized prefix (origin -> Origin, text-text -> Text-text).

I am hesitant about current solution of detached head, as far as I see there is two options:

1. Show some special symbol on every match by target (current solution with "? " prefix)
2. Compare reference to last target in reflog of head I implemented the first one because its easier, but if you decide that 2nd is better I will do so, so let me know

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.35%. Comparing base (fad4740) to head (112cca9).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #134 +/- ## ========================================== + Coverage 87.04% 87.35% +0.31% ========================================== Files 53 53 Lines 3750 3834 +84 ========================================== + Hits 3264 3349 +85 + Misses 486 485 -1 ```

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[altsem]

I had a Quick Look at the code now. Will do some testing after work maybe 👍

[altsem]

Merging this, gj! :rocket: