Implement functionality for Multi-Targeted attacks in BattleState.py

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• Toon attacks such as Lure (Magnet, Hypo-goggle), Sound, and even Trap (Railroad)
• Cog attacks such as Yesman's Synergy

[nosas]

There are a few scenarios where multi-targeted attacks can logically fail in the code..

Multi-Lure:

• If all Cogs are Lured, this Gag should not be allowed to be selected at all.
• Toon attacks all Cogs, accuracy is based on the strongest Cog's defense.
• If the attack hits, all Cogs are Lured. If a Cog is already Lured already Lured, catch the error.

Multi-Squirt:

• Toon#1 selects a low-health Cog#1 with a multi-targeted Squirt
• Toon#2 selects the same Cog#1 with a multi-targeted Throw, attacks, and defeats the Cog.
• If there are other Cogs alive in the Battle, Toon#1 should still be able to use the multi-targeted Squirt, despite its targeted Cog already being defeat. However, this scenario will currently skip Toon#1's attack if the target_cog is defeated, despite the Gag being multi-targeted and other Cogs being alive.

I should have a multi-targeted attack method in Toon and Cog rather than Entity.