[Work Item]: bikeshed direct macro name

[BoxyUwU]

direct! direct_const_arg! who knows :3

cc @khyperia

[khyperia]

yippee, bikesheds!

IMO the macro is very related to the syntax of type const. In my head, direct_const_arg! is basically(ish) equivalent(ish) to a type const (one might even say it's an anon type const :3), so drawing syntax parallels between them might be cute. We might rename type const (and also put it back to being an attribute), maybe #[type_const] and type_const!() (or whatever we rename type const to) ✨