[Sprite snapshot] Handle 3D layers

[CorporateDog]

Updated the 'RenderLayer' and 'RenderScene' functions to handle 3D objects and camera positioning better.

[CorporateDog]

The initial set of CircleCI tests failed, due to my use of the 'gdjs' global object.

If there's a better global object for me to attach my persisted objects to ('window' maybe?) please let me know.

[D8H]

Thank you for submitting an extension update.

If you need to keep some kind of state, you can add it to gdjs._renderToSprite. It's the namespace already used by this extension.

GDevelop-extensions/scripts/lib/ExtensionsValidatorExceptions.js

Lines 399 to 414 in e50f0e5

	RenderToSprite: {
	gdjsAllowedProperties: [
	'_renderToSprite',
	// Used for better autocomplete
	'SpriteRuntimeObject',
	],
	gdjsEvtToolsAllowedProperties: [],
	runtimeSceneAllowedProperties: [
	// Used for rendering
	'getRenderer',
	// Used to update culling before rendering
	'_updateLayersPreRender',
	'_updateObjectsPreRender',
	],
	javaScriptObjectAllowedProperties: [],
	},

You may find more details in these documentations:

• https://wiki.gdevelop.io/gdevelop5/events/js-code/javascript-in-extensions/
• https://wiki.gdevelop.io/gdevelop5/extensions/best-practices/#javascript-usage