- added `object_color_type` where the user can set if the collection determines the color, or the object will be used for the color. Implemented it as an enum as later this can have a random color option. - moved OB_LIGHTING_* to DNA_view3d_types and renamed it. - Fixed some DRY in workbench_materials.c. Can remove more DRY's but will need to discuss the responsibility of the workbench engine as it might become part of the eevee renderer.