Write documentation for trap data

[chaosvolt]

Is your feature request related to a problem? Please describe.

Scarf requested this while streaming their work on reviewing PRs while looking at #3941, it seems we have documentation for the place_trap use action, for the ability fo terrain to have traps linked to them, etc but not trap info itself.

Describe the solution you'd like

Write the thing. I'll do it tomorrow most likely.

Additional context

No response