Add Render Picker plugin

[tomas7770]

Description

Adds a renderPickerPlugin in the cubos/engine/render directory, which registers a component named RenderPicker, and a system which automatically resizes render picker textures when the corresponding render target is resized.

This should do the same as the existing screenPickerPlugin and ScreenPicker, but uses the new RenderTarget.

Checklist

• [ ] 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-1115/ on branch gh-pages at 2024-04-04 21:15 UTC

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 27 lines in your changes are missing coverage. Please review.

Project coverage is 38.15%. Comparing base (38fb934) to head (d4296b2).

Files	Patch %	Lines
engine/src/render/picker/plugin.cpp	0.00%	23 Missing :warning:
engine/src/render/picker/picker.cpp	0.00%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1115 +/- ## ======================================= Coverage 38.15% 38.15% ======================================= Files 319 321 +2 Lines 25617 25644 +27 ======================================= + Hits 9773 9784 +11 - Misses 15844 15860 +16 ```

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