Draft PoC of blame using gitoxide - #2591

@cruessler do you think it would be possible to aim to make that the headline feature for 0.29?

@extrawurst I’m pretty sure that’s a realistic goal!

We would only have to decide how much tolerance we have for gix-blame differing from git blame due to differences in the underlying diff algorithm. (If you haven’t seen yet, there’s this tracking issue for differences in the diff algorithm: GitoxideLabs/gitoxide#2308.)

As far as I can tell, things have improved significantly in that area recently, though. Behind a feature flag, I’ve updated the diff library used by gix-diff, imara-diff, to a new version, 0.2. Using 0.2, gix-blame matches git blame on around 95 % of all lines in the gitoxide repository I tested this with (off the top of my head, I still want to document that somewhere). I’m planning on pushing a commit that uses that feature flag in this PR this weekend.

I hope that makes sense, let me know if you want more context!

Before declaring this ready for review, I want to run a couple of benchmarks.