Fix projectile cooldowns when switching teams

[Pugzy]

Started out as a fix for #1285 where switching teams would result in items bypassing their cooldowns.

Ended up refactoring the whole runner and cooldown logic:

• Store all of a player cooldown sin single ProjectileCooldowns class.
• Store all player cooldowns in a player UUID keyed hashmap.
• Tick player cooldowns collectively and only update visuals for item in hand (reduces multiple inventory iterations and checks).
• Add slight increase to item name visual cooldown duration.
• Stop items that have cooldowns sub 200ms from having their name changed.
• Reset player cooldowns on participation end (leave or team switch).