Add firebot:cooldown-command to KnownEffectType

[kpaulisse]

• Adds firebot:cooldown-command to KnownEffectType

I wanted to add an effect that would cancel a cooldown on a command under certain circumstances, but this was not exposed as a known event type. I confirmed that the following effect correctly canceled the global cooldown:

{
  type: 'firebot:cooldown-command',
  selectionType: 'command',
  commandId: runRequest.trigger.metadata.command.id,
  action: 'Clear',
  clearUserCooldown: false,
  clearGlobalCooldown: true,
},

[ebiggz]

Thanks for the contribution!