Implement damage UI, damage and stale moves. (#45)

Reviewed-on: #45
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/fighter/state/ground_attack.rs

@@ -47,13 +47,13 @@ impl FighterStateImpl for GroundAttackState {
     fn on_enter(&mut self, state_context: &mut EnterContext) {
         state_context.play_animation(self.attack_kind.get_animation(), false);
         let script = state_context.attack_script_assets.scripts[&self.attack_kind].clone();
-        state_context.stale_move_queue.push(self.attack_kind);
         state_context.hitboxes.0 = Some(crate::fighter::FighterActiveAttack {
             kind: self.attack_kind,
             script,
             active_hitboxes: Vec::new(),
             solved_hitboxes: Vec::new(),
             hit_fighters: Vec::new(),
+            stalled: false
         });
     }