feat: add audio source

[leanmendoza]

• Load mp3, wav and ogg
• only play current scene and global
• check loop mode works

[codecov-commenter]

Codecov Report

Attention: 139 lines in your changes are missing coverage. Please review.

Comparison is base (e35a264) 16.42% compared to head (1b68e50) 16.20%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #59      +/-   ##
==========================================
- Coverage   16.42%   16.20%   -0.22%     
==========================================
  Files          66       68       +2     
  Lines        8353     8489     +136     
==========================================
+ Hits         1372     1376       +4     
- Misses       6981     7113     +132     

Files	Coverage Δ
...aland-godot-lib/src/godot_classes/dcl_camera_3d.rs	66.66% <ø> (ø)
...nd-godot-lib/src/godot_classes/dcl_audio_source.rs	66.66% <66.66%> (ø)
...and-godot-lib/src/scene_runner/deleted_entities.rs	0.00% <0.00%> (ø)
...d-godot-lib/src/scene_runner/components/raycast.rs	0.00% <0.00%> (ø)
...t/decentraland-godot-lib/src/scene_runner/scene.rs	22.34% <15.38%> (-2.17%)	⬇️
...traland-godot-lib/src/scene_runner/update_scene.rs	0.00% <0.00%> (ø)
...raland-godot-lib/src/scene_runner/scene_manager.rs	0.35% <0.00%> (-0.01%)	⬇️
...ot-lib/src/scene_runner/components/audio_source.rs	0.00% <0.00%> (ø)

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