pogo-pin jtag adapter for nRF52840-dongle

# Version 2
"pogo-top.stl" and link to fusion360 model. Adds a lock from the bottom as version 1 has a design weakness that the sides break with time and don't hold good enough.
"pogo-through-usb.stl" provides the bottom lock but leaves the top free to require glues.

Available 360 online model view and download : https://a360.co/3jr91PD

3d print a pogo pin adapter to help connect a jtag programmer to the nRF52840 usb dongle.

* No soldering/spoiling the board required for debug.
* spa