0.3.0

Library Updates:
- Upgraded bevy to version 0.16.0.
- Upgraded kira to version 0.10.6.
- Updated all other dependencies to their latest versions.
API Enhancements:
- Added support for playing sounds on specific tracks using the
  KiraTrackHandle component. This is to better allign with the Kira API. Track
  handles for sub-tracks should now be added wrapped in a KiraTrackHandle
  component to any entity that is convienent to associate with the track. When
  writing a KiraPlaySoundEvent, there is an optional track_entity field that
  can be used to target a specific track. If not provided, the sound will play
  on the main track (see the drum_machine example).
- Enhanced the KiraPlayable trait to support playing sounds on main or custom tracks.
Examples:
- Updated examples to reflect the new API changes:

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