Move old serialization code to cubos::core::data::old

[RiscadoA]

Description

Moved all existing serialization related code to the core/data/old directory and to the core::data::old namespace.
This was done simply through a few find and replaces.

Checklist

• Self-review changes.
• Evaluate impact on the documentation (wasn't documented).

[github-actions]

PR Preview Action v1.4.4
🚀 Deployed preview to https://GameDevTecnico.github.io/cubos/pr-preview/pr-616/
on branch gh-pages at 2023-09-28 22:04 UTC

[codecov]

Codecov Report

Attention: 32 lines in your changes are missing coverage. Please review.

Comparison is base (66bc6ef) 36.57% compared to head (0d5fe48) 36.57%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #616      +/-   ##
==========================================
- Coverage   36.57%   36.57%   -0.01%     
==========================================
  Files          89       89              
  Lines        6367     6368       +1     
==========================================
  Hits         2329     2329              
- Misses       4038     4039       +1     

Files	Coverage Δ
.../include/cubos/core/data/old/binary_serializer.hpp	100.00% <ø> (ø)
core/include/cubos/core/data/old/context.hpp	100.00% <ø> (ø)
...e/include/cubos/core/data/old/debug_serializer.hpp	0.00% <ø> (ø)
core/include/cubos/core/data/old/deserializer.hpp	100.00% <ø> (ø)
core/include/cubos/core/data/old/package.hpp	83.33% <ø> (ø)
.../include/cubos/core/data/old/serialization_map.hpp	69.23% <ø> (ø)
core/include/cubos/core/data/old/serializer.hpp	55.55% <ø> (ø)
core/include/cubos/core/ecs/blueprint.hpp	94.73% <100.00%> (ø)
core/include/cubos/core/ecs/commands.hpp	95.65% <ø> (ø)
core/include/cubos/core/ecs/component_manager.hpp	100.00% <ø> (ø)
... and 25 more

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