feat: Rendering/sky box v2 sun moon and stars

[mikhail-dcl]

From the Unity side this is what should be done to target the production quality:

• Eliminate Find Object Call
• Make Renderer Feature not throw exception if the settings are missing (currently, it works on the DynamicLoaderScene only)
• Compute Shader: MissingReferenceException on scene change
• Introduce a system to update the render feature directly or via a shared model
• Move all the math from the main thread (it looks quite heavy)
• Move all the values to the Debug Widget
• Add a Pause button to stop simulating the time of day change
• Try replacing Marshal.SizeOf
• Make the system work from the Edit Mode [optional]
• Serialize Stars' compute buffers directly with Unity if it's possible [optional]

How to test:
Use the debug panel to control values.
They should change the appearance of the sky box both in Editor and Build. In case of doubts @GBirch33 should be able to provide details of the time of day algorithm.
There should be no exceptions related to Sky Box at any point with any values.

[github-actions]

Windows build successfull! You can find a link to the downloadable artifact below.

Name	Link
Commit	0970237
Logs	https://github.com/decentraland/unity-explorer/actions/runs/7451205018
Download	https://github.com/decentraland/unity-explorer/suites/19605334776/artifacts/1154779338

[anicalbano]

When the zoom is at full and you see the horizon line, you can still see the night sky on a thin line even if it's day time:

Besides this minor thing, the build appears to be working on Windows:

26.12.2023_09.57.12_REC.mp4

I'll approve the PR depending on what's mentioned above 😄

[Ludmilafantaniella]

Looks good on Mac as well. I was able to reproduce Ani's issue with the night sky on the horizon when it's still day.
The directional light matches the position and rotation of illuminating elements (sun or moon) with corresponding color and intensity variations based on time marks.

[mikhail-dcl]

With @GBirch33 we fixed the forementioned bugs