I removed the grammar recipes in 3b58741 to avoid redundancy with the
upstream recipes, but didn't realize that those upstream recipes weren't
added until Emacs 31, so users on 30 and older would get errors when
trying to install any missing grammars.
This also establishes a hard dependency between :lang (php +tree-sitter)
and :lang ({javascript,web} +tree-sitter).
Amend: 3b58741522
featurep! will be renamed modulep! in the future, so it's been
deprecated. They have identical interfaces, and can be replaced without
issue.
featurep! was never quite the right name for this macro. It implied that
it had some connection to featurep, which it doesn't (only that it was
similar in purpose; still, Doom modules are not features). To undo such
implications and be consistent with its namespace (and since we're
heading into a storm of breaking changes with the v3 release anyway),
now was the best opportunity to begin the transition.
