Overhatted

@zjturner That is a very nice bxl, thanks for sharing. I think it's worth creating a PR and putting it into the prelude since most C++ users will need that....

I would put it in https://github.com/facebook/buck2/tree/main/prelude/cxx/tools since there are already a few script there.

@zjturner Can you share that BXL under the MIT license or something similar? I would like to use it and make some improvements to it but I can't really do...