Police Detective profession

Adds detective profession, a slightly-upgraded cop with an S&W 610 and a
smoking problem. Also adds a detective badge to armor.json,
item_groups.json (with cop spawns), and the detective in
professions.json. Adds compatibility for the detective to the "Assault
on Precinct Z" scenario.
Merge pull request #9613 from Mdnthrvst/Detective

Police Detective profession