Convert Grease Pencil strokes to quads

Right now, there is no way to export or convert 3d Grease Pencil art in a way that preserves its color and thickness information as well as its 3d information. In order to enable this, a good first start would be to be able to select a GP layer or strokes, and have an option to do any of the following:

1. approximate the best flattening orientation (averaging), from that determine the boundaries of a projection like that, bake the GP visual information to a texture and create a quad with the correct UV information and placement in the scene.

2. automatically divide the selected strokes into groups based on how close their scene placements match, and then execute step 1 for each group separately

3. somehow, convert GP visual information to polygons with the materials intact, with a good way to simulate the overlapping mechanism of GP to prevent z-fighting