[Feature Request] cast spell mechanic

Please add a cast spell mechanic.

In order to use the spells in special archetype items as a shortcut, it would be nice if you could cast the spells directly as a mechanic.

For example a special warrior sword (with MythicCrucible):

warrior_sword:
...
  Skills:
  - castSpell{s=Warrior_Basic_Attack} @self ~onSwing ?archetype{group=CLASS;archetype=Warrior}
  - castSpell{s=Warrior_Basic_Attack} @self ~onAttack ?archetype{group=CLASS;archetype=Warrior}
  - castSpell{s=Warrior_Special_Attack} @self ~onUse ?archetype{group=CLASS;archetype=Warrior}
  - castSpell{s=Warrior_Shield} @self ~onCrouch ?archetype{group=CLASS;archetype=Warrior}