feat: implement audio object definitions and refactor audio system

- Add AudioObjectDefinitions.cs with name-to-ID mappings and ambiguity detection
- Update AudioSystem.cs to support Play(uint) and deprecated Play(string) with warnings
- Rename PitchStepManager to PitchStepResolver and update all references
- Refactor generated code to use 'this.' prefix and foreach loops
- Remove TestEnum from audio enums and IDs
- Update SampleScene.unity to use new AudioSystem namespace and rain sound parameter
- Optimize binary serialization in generated audio classes

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

@@ -94,9 +94,9 @@ public partial class MusicContainer : IBinarySerializable
 		else
 		{
 			writer.Write(Segments.Count);
-			for (int i = 0; i < Segments.Count; i++)
+			foreach (var t in Segments)
 			{
-				writer.Write(Segments[i]);
+				writer.Write(t);
 			}
 		}
 		writer.Write((byte)ContainerType);
@@ -116,7 +116,7 @@ public partial class MusicContainerConfig : IBinarySerializable
 
 	public List<MusicContainer> MusicContainerList()
 	{
-		this.m_musicContainerInfoList ??= new List<MusicContainer>(m_musicContainerInfos.Values);
+		this.m_musicContainerInfoList ??= new List<MusicContainer>(this.m_musicContainerInfos.Values);
 		return this.m_musicContainerInfoList;
 	}