Fix MaceDMG reliability with Killaura, spear hits, and AttributeSwap swaps + spear aura fix

[Altidias]

MaceDMG only smashed when your crosshair was on the target and when itsattack listener happened to run after a weapon swap, so it was unreliable with Killaura, with spears, and alongside AttributeSwap. Separately, aura couldn't hit with a spear at all, because it used the wrong attack method.

• MaceDmgHack
  • Removed the MC.hitResult == ENTITY gate. The PlayerAttacksEntityEvent
    already means an entity is being hit, requiring the crosshair on it
    suppressed the smash for Killaura (which attacks via gameMode.attack
    without you looking at the target).
  • Extracted the smash into a public doSmash() guarded by a once-per-tick
    check (lastSmashTick), so it can be triggered externally without
    double-firing.
• AttributeSwapHack
  • Implemented LeftClickListener so the swap also fires on the attack
    input, covering spear / left-click hits that don't go through the normal
    attack path.
  • After swapping, calls maceDmgHack.doSmash() so the smash lands right
    after the mace is equipped.
• KillauraHack
  • Made aura spear aware: when the held item has a PIERCING_WEAPON
    component, attacks route through gameMode.piercingAttack() (the STAB
    action packet) instead of gameMode.attack().