`atan2` in @GlobalScope, i think it would be clearest to include the range of the function

**Your Godot version:**
4.3

**Issue description:**
Although atan2 commonly has a range between -pi and pi, I think it would still be best to explicitly include this information on the docs page. For example, in trig classes, you learn that tan(x) either has a range from 0 to 2pi or -pi to pi, and so if you start doing gamedev and use the atan2 function, you might expect one or the other of these to be stated somewhere. Of course atan2 is a different function, which almost always has a range of between -pi and pi, but I think for beginnners it could help, and its only like 1 extra line in the docs.

**URL to the documentation page (if already existing):**
https://docs.godotengine.org/en/stable/classes/class_@globalscope.html#class-globalscope-method-atan2