Add rotation support to radius_visualisation_specification

[protocol_1903]

I'd like to be able to have the placement visualization properly support rotating when the entity is rotated in the cursor. It rotates to the correct offset from the entity but the sprite itself does not rotate. For example, if I have an arrow sprite under crafting machines, I want it to rotate to face the direction of the entity when you hover over it.

[Rseding91]

This would be better worded as "add a new feature to render arbitrary areas/sprites on an entity when hovered"

As the name implies: radius_visualisation is about a radius from the entity being visualized - not arbitrary sprites related to the rotation of the entity.