Switch over from libgit2 to gix for git.rs

[ZeWaka]

Removes the dependency on libgit2, switches to gitoxide/gix/git-repository instead.

rustg_git_revparse working identically, for rustg_git_revparse("HEAD") of my local:

rustg_git_commit_date on that same commit:

Advisory: This does add a lot of small internal dependencies to the git-repository crate, so the final release binary goes from 6.55MB to 7.12MB, an increase of 0.57MB.
I aim to make up this difference elsewhere (see #128, saved 1.56MB there), as I don't see any immediate ways to pare down this crate (the discover fn is in the base crate, the rest seem to be in deps we could use).

[Mothblocks]

Every time you say libshit2 I have literlaly no idea what you mean and have to check

[optimumtact]

, so the final release binary goes from 7.14MB to 7.55MB, an increase of 0.41MB.

literally who cares lmao I have 4 terabytes of disk space

[ZeWaka]

, so the final release binary goes from 7.14MB to 7.55MB, an increase of 0.41MB.

oranges: literally who cares lmao I have 4 terabytes of disk space

see:

[6:58 PM] mothblocks: make sure it doesnt bloat our file size too much
[6:58 PM] mothblocks: remembert that loading a dll contributes to the memory limit
[6:58 PM] mothblocks: which isnt as big of a deal as it used to be
[6:58 PM] mothblocks: but im sure someone willbe p issed off at me eventually about it

[Mothblocks]

That was in reference to statically linking an ssl lib btw

[optimumtact]

who would be pissed what a load of horse shit

[Mothblocks]

Idk i just dont like getting yelled at by mso

[optimumtact]

protip fo rdealing with mso just lie and say I did it

[ZeWaka]

need to switch to gix package name

[optimumtact]

finish ur shit

[ZeWaka]

This isn't a super big problem anymore since libgit2 doesn't require libssl1 (mysql still does unfortunately) anymore it seems. This PR could go either way.

[optimumtact]

replace mysql with postgresql

[ZeWaka]

Closing due to redundant