Add core::gl::Timer

[tomas7770]

Description

Adds a Timer to RenderDevice, which exposes OpenGL queries to allow profiling sections of rendering code. Also adds an higher-level PipelinedTimer for profiling every frame asynchronously.

Checklist

• [x] Self-review changes.
• [ ] Evaluate impact on the documentation.
• [ ] Ensure test coverage.
• [ ] Write new samples.
• [x] Add entry to the changelog's unreleased section.

[github-actions[bot]]

PR Preview Action v1.4.7 :---: :rocket: Deployed preview to https://GameDevTecnico.github.io/cubos/docs-preview/pr-1260/ on branch gh-pages at 2024-06-16 14:49 UTC

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 58 lines in your changes missing coverage. Please review.

Project coverage is 40.61%. Comparing base (044ee71) to head (dd20d21).

Files	Patch %	Lines
core/src/gl/ogl_render_device.cpp	0.00%	40 Missing :warning:
core/src/gl/render_device.cpp	0.00%	16 Missing :warning:
core/include/cubos/core/gl/render_device.hpp	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1260 +/- ## ========================================== - Coverage 40.70% 40.61% -0.09% ========================================== Files 354 354 Lines 26272 26330 +58 ========================================== Hits 10695 10695 - Misses 15577 15635 +58 ```

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