feat(entities): andamiatge del sistema d'entitats (classes, factory, bus, YAML, placeholders, smoke tests)

data/entities/rolling_rock/rolling_rock.yaml

@@ -0,0 +1,17 @@
+name: rolling_rock
+type: dynamic_hazard
+sprite:
+  path: rolling_rock.gif
+  size: [16, 16]
+tile_size: [1, 1]
+flags:
+  collides: true
+  interactable: false
+animations:
+  roll: { frames: [0], fps: 10, loop: true }
+ai:
+  type: straight_line
+  initial_direction: right
+stats:
+  speed: 60
+  damage: 1