The events which can indicate a drag stop are varied:
- Drag a card into another on the table (tryObjectEnterContainer)
- Drag multiple cards into another on the table (onCollisionEnter, tryObjectEnterContainer)
- Group multiple cards while holding them (tryObjectEnterContainer)
Based in the newly-named Mythos Area, when a Scenario card lands the name will be extracted and sent to interested objects.
Playarea will use this for special location handling, and there will be other cases in the future.
Creates an API object for the PlayArea, and moves most references to the PlayArea to use the API instead.
Image swapper is excluded on this, as I'm not completely sure how TTS will handle having an object rebuild itself.
