https://github.com/github/gitignore/blob/main/C%2B%2B.gitignore
Our .gitignore file originated from this .gitignore template. This
template is made to be general-purpose and thus includes many things
we don't care about. We know that the SFML build won't produce files
with any of these patterns outside of the binary dir.
I alphabetized the list while I was at it.
Now that we use a CMakePresets.json file for CI, it makes sense to
support users having their own presets in a CMakeUserPresets.json file.
From CMake documentation:
> CMakePresets.json may be checked into a version control system, and
> CMakeUserPresets.json should NOT be checked in. For example, if a
> project is using Git, CMakePresets.json may be tracked, and
> CMakeUserPresets.json should be added to the .gitignore.
