`:make` will call `ghostty +validate-config` and populate the quickfix
list with the errors that can be navigated to (e.g. with `:cnext`)
`:h write-compiler-plugin`, and neovim's built in ftplugin/ and
compiler/ plugins were used as references
Only lines which contain (optional) whitespace followed by a # character
are comments. We should not treat lines like "foreground = #aaa" as
containing a comment.
