Add "Start of Combat" and "Start of Turn" activation types

[arbron]

When combat begins or when a turn begins, this would place a message in chat with a button to allow for easily triggering them. This would be useful for an ability like Regeneration which could automatically prompt DMs at the start of an NPCs turn and then they can decide whether to actually trigger the regeneration.

[JPMeehan]

Can you also work in End of Turn?

[arbron]

Yeah, I noticed at least one NPC that would require end of turn.