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/States/DashState.cs

@@ -29,6 +29,9 @@ namespace BaseGames.Player.States
         /// <summary>重置冲刺次数（落地或 Pogo 时由 IdleState/RunState/DownAttackState 调用）。</summary>
         public void ResetDashCharge() => _dashChargeUsed = false;
 
+        /// <summary>消耗空中冲刺次数（DownDashState 进入时调用，与普通空中冲刺共享次数上限）。</summary>
+        public void ConsumeAirDashCharge() => _dashChargeUsed = true;
+
         /// <summary>
         /// 无敌帧是否已冷却，即本次冲刺可以获得无敌。
         /// </summary>