Clarification on Node3D.rotate() axis and workaround for global coordinates

Godot version: 4.3

With Node3D.rotate(axis, angle) it was unclear what coordinate system the axis Vector3D should be in. Since there's also a rotate_object_local() method, it looked like it would work using global coordinates for the axis, but when I tested it seems like it actually uses the parent node's Transform for the rotation axis. I suggest adding the following clarification and workaround if you want to rotate based on global coordinates:

_This rotates the object using **axis** in the parent node's transform. If you instead want to rotate based on an axis using global coordinates, you can write the following method_

```
func rotate_object_global(axis: Vector3, angle: float) -> void:
rotate_object_local(to_local(global_position + axis), angle)
```

_or if many objects will need to rotate using an axis defined with global coordinates you could add this method to an Autoload for the rotating nodes to call_

```
func rotate_object_global(rotating_node: Node3D, axis: Vector3, angle: float) -> void:
rotating_node.rotate_object_local(rotating_node.to_local(rotating_node.global_position + axis.normalized()), angle)
```

The specific use-case that I ran into was trying to program a turret that was a child of a moving CharacterBody3D to aim at an enemy, which would naturally be done using global coordinates, but the fact that the parent was moving led to very strange behavior until I realized that rotate() wasn't using global coordinates.

URL to the documentation page: https://docs.godotengine.org/en/stable/classes/class_node3d.html#class-node3d-method-rotate