Adds Monadnock PR-24 Control Baton

The Monadnock PR-24 replaces the generic tonfas used by law enforcement officers. A high-end, collapsible, lightweight, side-handle police baton, this is the gold standard for officer safety and effective crowd control.

This PR also replaces the shock tonfas in the cop_weapons spawn list with actual tazers, which they did not have before and would likely use instead of a cobbled-together amalgam of 3 different tools.
I can see pulling the wood tonfas, but in reality it'd be a mix between the expandable metal (PR24) and polycarbonate fixed ("tonfa") items for police gear, probably a 50/50 split.  We aren't an advertising arm of Monadnock ;)