Adds Works post type, theme wizard and page templates to Artwork theme. Credits bg1.jpg is licensed under the Creative Commons Zero (CC0) license https://creativecommons.org/publicdomain/zero/1.0/, https://www.pexels.com/photo/person-woman-art-creative-522/, https://www.pexels.com/photo-license/ bg4.jpg is licensed under the Creative Commons Zero (CC0) license https://creativecommons.org/publicdomain/zero/1.0/ https://www.pexels.com/photo/working-art-crafting-handcrafted-29964/, https://www.pexels.com/photo-license/ bg2 is licensed under the Creative Commons Zero (CC0) license https://creativecommons.org/publicdomain/zero/1.0/, https://unsplash.com/photos/0WQOCx1g8hw, https://unsplash.com/license bg6 is licensed under the Creative Commons Zero (CC0) license https://creativecommons.org/publicdomain/zero/1.0/, https://unsplash.com/photos/i0WO_RzeB2Y, https://unsplash.com/license bg3 is licensed under the Creative Commons Zero (CC0) license https://creativecommons.org/publicdomain/zero/1.0/, https://unsplash.com/photos/DmqNuKJRPkw, https://unsplash.com/license bg5 is licensed under the Creative Commons Zero (CC0) license https://creativecommons.org/publicdomain/zero/1.0/, https://unsplash.com/photos/j0g8taxHZa0, https://unsplash.com/license