git: new recipe

[Ahajha]

Specify library name and version: git/2.45.1

Resolves #23601

Note: The one potentially relevant patch has not been submitted upstream. Frankly, Git's mailing list scares me, and I don't think the changes here would be robust enough to be accepted, but should be good enough for our usage.

I am unsure what to do about some of the packaged files, as some seem harmless but are picked up by the hook, while some are bloating the package but could be useful. Here's the tree output on Linux, omitting the rmdirs in the package() step (the contents of bin I believe should be agreeably useful):
tree.txt

The libexec/git-core folder would likely need to be added to the path if we decide to keep it. These commands seem to be part of the normal Git installation (though on my machine they aren't on they're not on path for some reason). There's also a duplicate git, so maybe only one of them is intended to be used? These are a ton of essentially extra copies of git, which greatly bloats the package size. I think it's fine to omit these, but would love input.

The share folder seems harmless (not big at all) but doesn't really contain much that would likely be useful for Conan users, mainly some perl scripts and some samples from what I can tell. Probably best to just make the hook happy and remove it.

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• I've read the contributing guidelines.
• I've used a recent Conan client version close to the currently deployed.
• I've tried at least one configuration locally with the conan-center hook activated.

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 16 (84bb36638fa43193dcee62ab401619aeaf738d46):

• git/2.45.1:
  All packages built successfully! (All logs)

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Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 16 (84bb36638fa43193dcee62ab401619aeaf738d46):

• git/2.45.1:
  All packages built successfully! (All logs)