Backend: Renderable Test Suit

[Thunderblade73]

What

Added a good way to add tests for renderables.
The test can be toggled with the /shrenderable ... ingame inside the dev enviroment.

This moved the to renderable test we had inside SkyHanniDebugAndTest and also added the scrollable test which I used to test the new scrollable renderable.

Also added GuiRenderEvent.GuiOnTopRenderEvent. (This event should be used instead of the GuiRender, which renders twice inside the Inventory, but that change should be done at a later point, since it is outside of the scope of this pr)
And proper docs for the Gui Events.

Changelog Technical Details

• Added Renderable Test Suit. - Thunderblade73
  • A way to add tests for renderables. Which can be called activated with /shrenderable.

[github-actions]

I have detected some issues with your pull request:

Body issues:
Change should end with a full stop in text: A way to add tests for renderables. Which can be called activated with /shrenderable

Please fix these issues. For the correct format, refer to the pull request template.

[github-actions]

6 Detekt Failures were detected:

• RenderableTestSuit.kt#L40: Redundant curly braces
• RenderableTestSuit.kt#L44: Redundant curly braces
• RenderableTestSuit.kt#L48: Redundant curly braces
• GuiRenderEvent.kt#L7: Unexpected indentation (4) (should be 5)
• GuiRenderEvent.kt#L12: Unexpected indentation (4) (should be 5)
• RenderableTestSuit.kt#L54: Name shadowed: implicit lambda parameter 'it'