Move feature checks into the utilities

huh, nice idea actually. we could throw those feature checks into the utilities and then we only have a single place to change and a single correct way to do it. also to unify the spots where we use both has_feature and get_name

_Originally posted by @Qubus0 in https://github.com/GodotModding/godot-mod-loader/pull/485#discussion_r1898908864_