feat: Implement DownDash ability and related systems

- Added DownDash ability with cooldown and speed configuration.
- Introduced DownDashState to handle down dashing mechanics, including gravity manipulation and animation playback.
- Updated PlayerMovement to support DownDash functionality.
- Enhanced PlayerStats to manage spring charge consumption and healing.
- Modified PlayerCombat and WeaponHitBoxInstance to support new hit confirmation events.
- Updated AbilityType to include new form types for character abilities.
- Improved Gizmos for better visualization of enemy detection and attack ranges.
- Added feedback systems for form switching in PlayerFeedback and IFeedbackPlayer.
- Refactored combat and movement states to accommodate new abilities and ensure smooth transitions.

Assets/_Game/Scripts/Player/PlayerAnimationConfigSO.cs

@@ -33,6 +33,10 @@ namespace BaseGames.Player
         [Header("弹簧")]
         public AnimationClip UseSpring;
 
+        [Header("下冲刺")]
+        [Tooltip("向下冲刺动画。留空则复用 Fall 动画。")]
+        public AnimationClip DownDash;
+
         [Header("弹反")]
         public AnimationClip ParryStart;
         public AnimationClip ParrySuccess;