[Xedra] Give Homullus Equipment Durability Mutation with New Enchant

[b3brodie]

Summary

Mods "Add new homullus mutations that increase equipment durability"

Purpose of change

Add new Homullus mutations that expand the categories focus on used equipment.

Describe the solution

Adds a new enchantment that alters the chance that weapons and armor (and clothes) take damage when used.
Adds two new mutations: equipment hardening and extreme equipment hardening, which reduce the likelihood to take damage by 33 and 66 percent, with the stronger mutation gated by threshold.
Adds the enchant to the homullus transformation ability at 100% resist to represent homulluses fully going into their element.

Describe alternatives you've considered

Splitting the enchantment into separate enchants for armor and weapon durability.
Adding the enchantment to other paraclesians, such as a combined Salamander mutation that increases armor value but decreased armor durability. Not sure of a good balance for that though.

Testing

Used flimsy equipment to clearly see differences in performance
Test Cases:
Flimsy Spear + Durability: multiply 99 = damaged every hit. Completely destroyed in 4 hits
Flimsy Spear + Durability: multiply -1 = completely invulnerable. Not damaged after several hundred hits
Cardboard Armor + Durability: multiply 99 = instantly destroyed on hit.
Cardboard Armor + Durability: multiply -1 = invulnerable. Never damaged despite active hulk attacks.

Additional context

N/A

[Maleclypse]

This is a perfect addition for homullus! Thank you!