This makes paintings into objects. Vanilla paintings were previously a set of geolayout commands in the level geo, plus 6 specific floor types per painting.

Benefits of paintings being objects (and other painting improvements part of this PR):

• You no longer need 6 specific floor types in the level geometry for each painting, so all the painting warp surface types are now freed up.
• Only one entrance warp node is now needed per painting, as opposed to 3 in vanilla.
• Painting warps now use the regular WARP_NODE command instead of an extra PAINTING_WARP_NODE command.
• Paintings are no longer restricted to 45 warps.
• Multiple paintings can now be near each other without breaking.
• Paintings can now be rotated at any angle.
• Paintings can now be moved around dynamically and can still be entered while moving.
• You no longer need to have a separate painting geolayout command for each room combination that has it loaded.
• Ripple effects are now accurate to Mario's position rather than being limited to specific quarters of the painting.
• The painting entrance/exit cutscene no longer randomly breaks like it does in vanilla (hopefully).
• Less information is required for custom Painting structs.
• SAVE_FLAG_DDD_MOVED_BACK is no longer needed.
• WDW water level detection is now relative to the painting itself instead of Mario's absolute height in the world.
• Paintings now have the same UVs when rippling and stationary instead of noticeably snapping into place around the edges.
• Custom painting shapes are now slightly easier to make as neighboring triangle data for each vertex is obtained dynamically rather than from a hardcoded list.

To create a custom painting:

1. Create a new PaintingImage struct for your painting. These include pointers to your texture data, texture count/size, how ripples are triggered, how the painting is displayed, and the size of the painting. In vanilla levels these are stored in painting.inc.c files.
2. Add a painting image ID to the PaintingImageIDs enum in paintings.h. The current name format is "PAINTING_ID_[level]_[destination]" but it can be whatever you want.
3. Add a pointer to the PaintingImage in sPaintings in paintings.c, corresponding to your painting image ID.
4. Add a painting object in the level script. Use the painting image ID for bparam1, and the warp node ID for bparam2.
5. Add a WARP_NODE with the same ID. This is the same as how doors and other warp objects work.

See vanilla paintings (castle_inside, hmc, ttm) for examples (paintings.inc.c, script.c).

TODO before merge:

• Documentation/instructions in paintings.c or paintings.h
• Prevent ripple source position from scaling with object scale