[Xedra Evolved] Update Ierde stone fists to fix oddities

[Standing-Storm]

Summary

Mods "[Xedra Evolved] Update Ierde stone fists to fix oddities"

Purpose of change

Got some reports of weird behavior with the Ierde trait stone fists, and the new enchantified melee damage makes it easy to fix.

Describe the solution

Make stone fists SEMITANGIBLE. Give them a melee_damage_bonus of 10, increasing to 15 once you have the third-tier Ierde skin trait. Punch out those zombies like Kenshirō.

This also edits Invulnerable Iron Skin so the bonus bash damage only applies if you don't have a weapon.

Describe alternatives you've considered

Testing

Stone fists does more damage than bare fists, stone skin + stone fists does yet more damage, and stone skin + stone fists + invulnerable iron skin does more damage still.

Additional context