feat: implement volume step feature

- Add volume step functionality with VolumeStepResolver class
- Add VolumeStepThreshold, Volume, and VolumeStep properties to AudioObject
- Integrate volume step resolution in SfxSystem for dynamic audio volume control

Assets/Scripts/OCES/Audio/Generated/AudioObject.cs

@@ -130,6 +130,23 @@ public partial class AudioObject : IBinarySerializable
 	/// </summary>
 	public bool RandomType { get; set; }
 
+	/// <summary>
+	/// Volume Step阈值 ms
+	/// </summary>
+	public uint VolumeStepThreshold { get; set; }
+
+	/// <summary>
+	/// 起始音量
+	/// dB
+	/// </summary>
+	public int Volume { get; set; }
+
+	/// <summary>
+	/// 音量变化幅度
+	/// dB
+	/// </summary>
+	public int VolumeStep { get; set; }
+
 
 	public void DeSerialize(BinaryReader reader)
 	{
@@ -166,6 +183,9 @@ public partial class AudioObject : IBinarySerializable
 		BlendCrossFadeType = (BlendCrossFadeType)reader.ReadByte();
 		LimitRepetition = reader.ReadByte();
 		RandomType = reader.ReadBoolean();
+		VolumeStepThreshold = reader.ReadUInt32();
+		Volume = reader.ReadInt32();
+		VolumeStep = reader.ReadInt32();
 	}
 
 	public void Serialize(BinaryWriter writer)
@@ -202,6 +222,9 @@ public partial class AudioObject : IBinarySerializable
 		writer.Write((byte)BlendCrossFadeType);
 		writer.Write(LimitRepetition);
 		writer.Write(RandomType);
+		writer.Write(VolumeStepThreshold);
+		writer.Write(Volume);
+		writer.Write(VolumeStep);
 	}
 }