upgrade gitoxide to v0.44 (and incorporate #1023):x (#1024)

* Switch from `git-features` to `gix-features`

* upgrade `gitoxide` to v0.44 for native shallow support and faster repo discovery.

As `onefetch` only cares about bare repositories, we now optimize discovery
to only find those, and do so much faster. This may play a role on very
slow filesystems.

See helix-editor/helix#6867 for reference.

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Co-authored-by: Spenser Black <[email protected]>

Author: Byron