I would think a first step would be to enable commenting on git commits.

Point to a remote repo location (lol, on GitHub to start!) and enumerate the commits for a project (use pagination, obv). Then allow for notes to be "pinned" in a thread to a commit.

From there you could start a discussion around code updates. (Would have to look at PRs to understand more of their primitives)

fwiw, Tauri is a neat framework to try.