Replace libgit2 with gitoxide

CHANGELOG.md

@@ -53,6 +53,7 @@
 - Allow home and end keys to be used with builtin pager, see #3651 (@keith-hall)
 - Builtin syntax mapping: cleanup matcher glob parsing logic #3652 (@cyqsimon)
 - Statically link the CRT for MSVC builds via Cargo config to avoid runtime DLL dependencies. Closes #3634, see #3692 (@barry3406)
+- Replace `libgit2` with a pure Rust implementation of git called `gitoxide`, see PR #XXXX (@blinxen)
 
 ## Syntaxes