Use github actions to automatically generate packagelist

[talwat]

I think this would be pretty trivial to implement and would enforce things like proper alphabetical ordering and so on, and could also automatically react to edits of package names.

[Elsie19]

I feel like that would bloat the commit listing don’t you think?

[talwat]

Or perhaps it's run on every PR, and then that PR is squashed so you can't even see it.