Change the AABB name to BoundingBox3D

[hidemat]

Just a thought. The AABB name might be a little abstract for new comers. BoundingBox3D I feel would make it more obvious what the class is used for just from reading the name. Opinions?

[Mickeon]

AABB is the 3D equivalent of Rect2. t's used in bounding boxes, but it is not the bounding box in and of itself. At its core it's just a rectangular cuboid.

[Calinou]

AABB was called Rect3 back in the Godot 2.x era. Its current name (AABB) is intended to make its axis-aligned nature explicit.

[hidemat]

Understood. I see the reason for its name.