M14x1- Threaded Tracer plug

This is a WIP design to remix another design of a plug to trigger the tracer unit to turn itself off. The [original design by Byrano](https://www.thingiverse.com/thing:5793308) doesn't have anything to secure the plug inside of the tracer unit, so I added a thread to be able to screw the plug into the tracer.

Instructions: thread the plug into the tracer unit. The Acetech Brighter C tracer unit will flash and make 3 short beeps. Wait for 5 sets of 3 beeps (15 beeps total), ~30 seconds, and then the tracer will shut itself off.