Move resource stuff to the ecs/resource directory

[RiscadoA]

Closes #646.

Description

Moves the resource manager to the ecs/resource directory.

Checklist

• Self-review changes.
• Evaluate impact on the documentation.

[github-actions]

PR Preview Action v1.4.4
Preview removed because the pull request was closed.
2023-10-02 22:32 UTC

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (f65b241) 36.56% compared to head (91907ee) 36.56%.
Report is 11 commits behind head on main.

❗ Current head 91907ee differs from pull request most recent head 756bb72. Consider uploading reports for the commit 756bb72 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #650   +/-   ##
=======================================
  Coverage   36.56%   36.56%           
=======================================
  Files          92       92           
  Lines        6378     6378           
=======================================
  Hits         2332     2332           
  Misses       4046     4046           

Files	Coverage Δ
.../include/cubos/core/data/old/serialization_map.hpp	69.23% <ø> (ø)
core/include/cubos/core/ecs/blueprint.hpp	94.73% <100.00%> (ø)
core/include/cubos/core/ecs/component/manager.hpp	100.00% <ø> (ø)
core/include/cubos/core/ecs/component/registry.hpp	90.00% <ø> (ø)
core/include/cubos/core/ecs/component/storage.hpp	72.72% <ø> (ø)
...e/include/cubos/core/ecs/component/vec_storage.hpp	100.00% <ø> (ø)
core/include/cubos/core/ecs/entity/entity.hpp	100.00% <100.00%> (ø)
core/include/cubos/core/ecs/entity/manager.hpp	100.00% <ø> (ø)
core/include/cubos/core/ecs/resource/manager.hpp	86.04% <ø> (ø)
core/include/cubos/core/ecs/system/accessors.hpp	100.00% <ø> (ø)
... and 16 more

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