[GSoC] Week 7 and week 8 status update

Hi Git community,

Here is Shaoxuan Yuan.

I'm writing to share my latest progress [1] from GSoC week 7 and week 8.

You can read it when you are free, and generously give me some advice if possible!

--- Summary

In the past two weeks, besides keeping the work on `git-mv`, I was also working on the sparse-index integration with `git-rm`. I shipped one iteration of `git-mv` series and two iterations of `git-rm` series. At the time of writing, `git-mv` is v2 and `git-rm` is also v2.

[1] https://ffyuanda.github.io/blog/GSoC-week-7-8/