[GSoC][Draft Proposal] Refactoring in order to reduce Git's global state

Hi everyone,

I'm Tian Yuchen and I'm planning to apply for GSoC this year!

Instead of pasting a giant wall of text into this email, I have drafted my proposal in Google Doc. I thought it might be easier for everyone to leave inline comments and suggestions there. (Of course, if you're more accustomed to email replies, you can also quote the content from the doc in your response. Thank you.)

Here is the link:

https://docs.google.com/document/d/1t2sznOvnPz-9tOzVMH--pLxzRqYSJCFzqVWBVfL_NP8/edit?tab=t.0#heading=h.c3c40ftj1ilv

Feel free to provide feedback!

Regards,

Yuchen