[PR] Adds the Syndicate Wet Floor sign

[Honk Twice]

Might be cool if you could anchor it with a wrench, so it'd not the easiest thing to space.
(It'd still be easy, but not every crewmember has a wrench on them. :P)

I'd like it to be ID-locked, so you have to find the person who put it there to move it. Traitors could use burner IDs stolen from others to deny culpability.

Alternatively the anchor function could be accessed by agent cards.

The workaround could be having it also unanchor if there's no floor under it, so if someone really wants it gone they have to go to the effort of removing the floor to get it out of the way.