This updates `fmt` to the latest version and moves to just being a copy
of their repo to make updating easier (no editing their cmake / figuring
out which files to minimally include).
The motivation for this is now that we switched to C++ 20, there were a
ton of deprecated function usages that is going away in future compiler
versions. This gets rid of all those warnings.
* add pretty printing to goos form
* temp
* fix format
* fix format
* fix windows build
* again
* windows
* Revert "windows"
This reverts commit b7d448e733.
* windows again
* give up and just add a getter function