feat: add first debug version of gix tag list

[cruessler]

This PR adds a new command: gix tag list.

gix tag list outputs a list of tags, adding information with respect to whether a tag is lightweight or annotated (the examples are taken from the gitoxide repository):

• for a lightweight tag, it will show the name it has in .git/refs/tags/: v0.8.4.
• for an annotated tag where the name is identical to the filename in .git/refs/tags/, it will show an asterisk next to the name: gix-v0.72.1 *.
• for an annotated tag where the name is not identical to the filename in .git/refs/tags/, it will show the tag name in square brackets: gitoxide-v0.8.1 [tag name: v0.8.1].

Feel free to modify this in any way you like, though, in particular if there are already established patterns in other parts of the codebase.

[Byron]

Thanks a lot, this looks like a great start!

I have made some adjustments to make gix tags possible as well.

And finally, a suggestion for a rainy day: I'd love it if by default it could produce the same order as git tag --sort='version:refname', effectively making it semver aware.
If that was present, it could be my standard way of obtaining tag information in future, as this is what I typically need but can never remember.

[EliahKagan]

And finally, a suggestion for a rainy day: I'd love it if by default it could produce the same order as git tag --sort='version:refname', effectively making it semver aware.

Is this to say that it the versionsort.suffix configuration variable should be recognized as well?