Add sfx for monster eating block

src/systems/monster_ai.rs

@@ -67,7 +67,10 @@ pub fn run(world: &mut World, resources: &mut Resources) {
                         match tile {
                             TileType::Wall => {}
                             TileType::Block => {
-                                // TODO: Sound
+                                resources.sound_output.play_sound(sound_effect_for_kind(
+                                    monster.kind,
+                                    &resources.sound_effects,
+                                ));
                                 *tile = TileType::Floor;
                                 has_died = Some(entity);
                             }