Feather Falling Rework

This mod makes two main changes to the Feather Falling enchantment:

1. Reduces the falling damage protection.
2. Adds safe fall distance attribute modifier, which allows the player to fall a few blocks before actually taking damage.

This just makes playing the game a little smoother since you won't take small ticks of damage from small falls.

It should work on any version past 1.21 (when data-driven enchantments were added), but it was tested only for 1.21.11 and it's not guaranteed to work in other versions.