- 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
- 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