World of Diving: Add all unmodified Unity light shaders in preparation for fix
World of Diving: Prepare ini for shadow fix
World of Diving: Delete disabled shadow shader

This isn't part of the Unity prepass lighting/collect shader bundle, so
it might need a different approach to fix, but I'll look at it again
later.
World of Diving: Misc ini whitespace fix
World of Diving: Fix shadows on main menu

Some distant shadows near rocks still look off, not sure if I'm missing
a surface shader or another lighting shader...