Move some code into non-mixin

Is it possible to move this section to a non-mixin method (public static access with the relevant coordination parameters)
Since there are some mods overhauling the enchantment menu - with this change they'd be able to just call that method

https://github.com/Octo-Studios/immersive-ui/blob/1.21/common/src/main/java/it/hurts/octostudios/immersiveui/mixin/EnchantmentScreenMixin.java