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

data/entities/mummy/mummy.yaml

@@ -0,0 +1,18 @@
+name: mummy
+type: dynamic_hazard
+sprite:
+  path: mummy.gif
+  size: [12, 24]
+tile_size: [1, 1]
+flags:
+  collides: true
+  interactable: false
+animations:
+  idle: { frames: [0], fps: 1, loop: true }
+  walk: { frames: [0], fps: 8, loop: true }
+ai:
+  type: corridor_wanderer
+  direction_choice: random
+stats:
+  speed: 40
+  damage: 1