feat: add scene coordinator

[leanmendoza]

Main goal

Enable change realm (unload and load scenes)

• Load parcel like genesis-city from pointer
• Load fixed sceneUrns from the realm

Another fixes

• Load embed texture from GLTF/GLB
• Fix reparenting

[codecov-commenter]

Codecov Report

Patch coverage: 62.93% and project coverage change: +10.77 🎉

Comparison is base (7dc6bac) 26.17% compared to head (8f81679) 36.95%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main       #9       +/-   ##
===========================================
+ Coverage   26.17%   36.95%   +10.77%     
===========================================
  Files          26       31        +5     
  Lines        1952     2752      +800     
===========================================
+ Hits          511     1017      +506     
- Misses       1441     1735      +294     

Impacted Files	Coverage Δ
...aland-godot-lib/src/http_request/rust_requester.rs	0.00% <0.00%> (ø)
rust/decentraland-godot-lib/src/lib.rs	33.33% <ø> (-16.67%)	⬇️
...rc/scene_runner/components/transform_and_parent.rs	0.00% <0.00%> (ø)
...land-godot-lib/src/scene_runner/godot_dcl_scene.rs	0.00% <ø> (ø)
...raland-godot-lib/src/scene_runner/scene_manager.rs	0.00% <0.00%> (ø)
...and-godot-lib/src/http_request/request_response.rs	51.16% <51.16%> (ø)
...nd-godot-lib/src/realm/scene_entity_coordinator.rs	62.41% <62.41%> (ø)
rust/decentraland-godot-lib/src/realm/parcel.rs	91.66% <91.66%> (ø)
...aland-godot-lib/src/http_request/http_requester.rs	93.16% <93.16%> (ø)

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.