Implementation of the GPv2 Fill tool in Grease Pencil 3.
This tool creates new strokes where the user clicks, by rendering
strokes into an image and then performing flood-fill and boundary
search operations.
This is a minimal first part, several features of the GPv2 tool are
still missing (gap filling methods, smoothing, dilate/erode).
Co-authored-by: Falk David <falk@blender.org>
Pull Request: https://projects.blender.org/blender/blender/pulls/120693
7a3cd753ba