Create Scriptable Brushes for interactive Tilemap tiles

[PotatoCombat]

Notes:

• Make torches that can be turned on and off
• Requires attaching a gameobject + script to the tile

[danielnyan]

Update: #86 will not close this issue anymore. Will close it in a separate PR

[danielnyan]

Postponed because we're considering putting torches off / on as sprites instead of tilemaps