This commit doesn't implement any new feature but makes the new curves object type no longer experimental. Documentation: * https://docs.blender.org/manual/en/3.3/modeling/curves/primitives.html#empty-hair * https://docs.blender.org/manual/en/3.3/sculpt_paint/curves_sculpting/introduction.html Note: This also makes the Selection Paint tool available. This tool should have been moved out of the "New Curves Tool" flag when we got the selection drawing to work. Differential Revision: https://developer.blender.org/D15402