[Feature] viewpos variant, "sunangles" command

[4LT]

This would effectively just be the angles portion of "viewpos" but in yaw/pitch/roll order and +180 (mod 360) to the yaw (and I think pitch inverted?).

The way this would work is you would look directly at the sun in a skybox and enter the sunangles command, and the printed string could be plopped right in worldspawn's _sunlight_mangle field