Bounding box: directional display

[enenra]

Another thing I want to implement into the bounding box operator is an option to display directional indicators forward, (left, right, up, down, back) in the viewport as it can become kind of confusing with SE not using the normal conventions, you know, because of course they don't.

That will require diving into the text draw options of Blender. Drawing will probably be less of the issue, considering I already have the box drawn, but determining where and with which rotation to draw text might get tricky.

[enenra]

Moved this to 1.0.0+ because it's non-essential and will be an absolute pain to figure out.

[enenra]

Placement math can be derived from mountpoints code but I'd still need to figure out how to draw 3D text and that's bound to be a pain. Maybe there's an option to place markers into 3D space that have text associated with them instead?
In the meantime, directions can be figured out by looking at the mountpoint empties' names.

[enenra]

This really isn't necessary as the mountpoint mode empties already show directions.