Add a new idea to do a tool like git-sizer

It's fun to do and simple and fast, at least as an MVP which just
gathers easy to achieve statistics.

Author: Byron

README.md

@@ -305,6 +305,7 @@ Provide a CLI to for the most basic user journey:
 
 * [ ] `gix tool open-remote` open the URL of the remote, possibly after applying known transformations to go from `ssh` to `https`.
 * [ ] `tix` as example implementation of `tig`, displaying a version of the commit graph, useful for practicing how highly responsive GUIs can be made.
+* [ ] Something like [`git-sizer`](https://github.com/github/git-sizer), but leveraging extreme decompression speeds of indexed packs.
 * [ ] Open up SQL for git using [sqlite virtual tables](https://github.com/rusqlite/rusqlite/blob/master/tests/vtab.rs). Check out gitqlite
   as well. What would an MVP look like? Maybe even something that could ship with gitoxide. See [this go implementation as example](https://github.com/filhodanuvem/gitql).
 * [ ] A truly awesome history rewriter which makes it easy to understand what happened while avoiding all pitfalls. Think BFG, but more awesome, if that's possible.