feat(ecs): add Cubos::inject

[RiscadoA]

Description

Adds a method to the Cubos class which allows the dev to inject a plugin into another plugin's place. This will be useful to make Tesseratos a standalone app, as we'll need to make a 'fake window plugin' for the game to run properly - we want the game to be shown within the existing Tesseratos window. The goal is to be able do this: game.cubos.inject(windowPlugin, fakeWindowPlugin). Then, when the game calls cubos.plugin(windowPlugin), fakeWindowPlugin will be added instead, seamlessly.

Checklist

• [x] Self-review changes.
• [x] Evaluate impact on the documentation.
• [x] Ensure test coverage.
• [x] 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-1223/ on branch gh-pages at 2024-06-10 12:07 UTC

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.

Project coverage is 40.33%. Comparing base (542ec25) to head (101db1a). Report is 4 commits behind head on main.

:exclamation: Current head 101db1a differs from pull request most recent head 1f2fc61

Please upload reports for the commit 1f2fc61 to get more accurate results.

Files	Patch %	Lines
core/tests/ecs/cubos.cpp	90.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1223 +/- ## ========================================== + Coverage 40.32% 40.33% +0.01% ========================================== Files 351 351 Lines 26061 26069 +8 ========================================== + Hits 10508 10515 +7 - Misses 15553 15554 +1 ```

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