Refactors crayons and spraycans

Fixes tgstation#17663

A reminder: spraycans are just special types of crayons for REASONS.
- Crayons and spraycans now use TGUI
- Crayons and spraycans now have internal reagent containers
- Crayons contain that crayon powder stuff, and nutriment
- Spray cans contain ethanol and welding fuel as before
- Spray cans will now no longer flush half a bottle of vodka into your
system when you are sprayed in the face
- Added some special admin only spraycans with sprites
- Maybe more? I can't remember, it's been a long day.