Add the operator from the io_import_images_as_planes add-on, making it a built-in operator. The main differences with the add-on are: - Compositor integration has been removed. - The file handler for dropping images has been removed to avoid a popup whenever images are dropped onto Blender. There were also changes to follow Blender's core scripts more closely: - Defer imports where possible. - Use `str.format`. - Use double-quotes for non-enum strings. - Remove or "_" prefix unused arguments. - Avoid unnecessary use back-slashes for wrapping lines. Otherwise all other functionality has been kept. Ref !122223 Co-authored-by: Aaron Carlisle <carlisle.b3d@gmail.com> Co-authored-by: Bastien Montagne <bastien@blender.org> Co-authored-by: Brecht Van Lommel <brecht@blender.org> Co-authored-by: Brendon Murphy <meta.androcto1@gmail.com> Co-authored-by: CoDEmanX <codemanx@gmx.de> Co-authored-by: Dalai Felinto <dalai@blender.org> Co-authored-by: Damien Picard <dam.pic@free.fr> Co-authored-by: Daniel Salazar <zanqdo@gmail.com> Co-authored-by: Florian Meyer <florianfelix@web.de> Co-authored-by: Jacques Lucke <mail@jlucke.com> Co-authored-by: Jesse Yurkovich <jesse.y@gmail.com> Co-authored-by: Jonathan Smith <j.jaydez@gmail.com> Co-authored-by: Luca Bonavita <mindrones@gmail.com> Co-authored-by: meta-androcto <meta.androcto1@gmail.com> Co-authored-by: Philipp Oeser <info@graphics-engineer.com> Co-authored-by: Pratik Borhade <pratikborhade302@gmail.com> Co-authored-by: Rick Astley <mrbimax> Co-authored-by: Sergey Sharybin <sergey@blender.org> Co-authored-by: Sibo Van Gool <SiboVG> Co-authored-by: Sun Kim <perplexing.sun@gmail.com> Co-authored-by: Thomas Dinges <blender@dingto.org> Co-authored-by: Victor Chedeville <victor-09@noreply.localhost>