Added octopus modpack.

[MistakeNot4892]

Description of changes

• Unifies wheelchair checking using cannot_stand().
• Adds a limb category for maniple limbs.
• Converts limb categories to use a JSON string to allow for a list of values returned to initial() (a la origin tech).
• Changes human movement delay tallying to use limb categories.
• Adds an octopus species originally ported from Europa.
  • Octopodes can blend in with their turf via gradual alpha changes, move faster in water, and have eight dual-purpose hands/feet.

Why and what will this PR improve

• Example of a very divergent nonhuman bodyform.
• Example of multiple hand slots.

TODO

• Update port to modern code.
• Update movement code to use organ categories instead of hardcoded BP lists.
• Redo octopus limbs to be dual-purpose grippers/legs.
• Fix octopus movement - too slow in water.
• Add offsets for hats/glasses/etc.
• Redo octopus limbs to have hand slots.
• Properly forbid octopodes from wearing standard uniforms etc.
• Add basic gear harness sprite.
• Add basic backpack sprite.
• Add basic emergency suit and emergency helmet sprites.

Authorship

Code and icons are both mine.

Changelog

🆑
add: Added octopus species modpack.
/:cl:

[MistakeNot4892]

Depends on #5198

[MistakeNot4892]

Depends on #5200

[MistakeNot4892]

Every time I work on this PR I have to go listen to https://www.youtube.com/watch?v=iQ9oJslfRSo