Shading Language Reference does not describe literals

[markeel]

Your Godot version:

4.4

Issue description:

Godot 4.4 requires uint in switch statement in a .gdshader, which requires constants and/or literals declared as uint, but there is no discussion in the Godot Shading Language description about literals.

The answer is to use <decimal number>u, but that was only figured out by guessing although looking at the GLSL language definition would give a clue as well.

URL to the documentation page (if already existing):

https://docs.godotengine.org/en/stable/tutorials/shaders/shader_reference/shading_language.html

[markeel]

Upon re-reading, I see a mention of uint in the Constants subsection, so maybe its just me, but it would have helped me and might help others if there was a "Literals" section and not just a mention in the Constants section.