JDAT-1484: Imviz region support: Plugin to rotate and center shapes

[pllim]

@eteq -- After some out-of-band discussion, I think we've settled on the idea that the initial implementation should be:

• A panel that handles rotation angle and pixel-level centering. That makes the workload for the rectangle easier since no UI changes are needed. We can consider a fancy rotation thingie later if it seems like it's useful, but not in this issue.
• That panel can later also do things like altering the region properties, etc. It should probably be a jdaviz plugin to start with, but it might/should be baked into glupyter at some point, and we can decide then whether we want to keep it as a "plugin" or not.

More discussions in #518. Also see glue-viz/glue-jupyter#224.

Blocked by:

• Region translators ignore rotation glue-viz/glue-astronomy#74

🐱

[pllim]

Rotation should be possible when glue-core v1.5.0 is released.

from glue.core.roi import RectangularROI

imviz.default_viewer.apply_roi(RectangularROI(1395, 1627, 1176, 1273, 45))