Update BOM files to newer JLC standard

[androda]

As noted in one of the related commits, the hardware folder is called "cc-nc-hardware" and the KiCAD design files call out that they are Creative Commons Non-Commercial. The licensing change adds a readme and license files which makes the license abundantly clear.

[erichelgeson]

Tested 50 pin on jlcpcb worked great. Thanks for updating these!