Add action(s) interacting with the environment

[SuperFola]

The why is pretty simple: being able to cast a fireball, burning ennemies and wood, is pretty cool

The how is more complex, since this will need to add (at least)

• [ ] new type of tile
• [ ] ability to query the type of a tile
• [ ] enhancements to the Fireball action to search for wood tiles where it hits
  • [ ] the propagation of the fire could be achieved through new actions being spawned for each tile to burn?