USB armory Mk II — design source pack

Mk II gamma board project and shared footprint libraries. Mk I, beta, LAN and debug accessory designs are excluded.

73 pinned upstream files. Files under sources/ are unmodified. Their original paths and licence notices are retained. See manifest.json for provenance, revisions, external sources and exclusions. SHA256SUMS covers the bundled upstream files.

We have not built and tested a reproduction from these files.

Known gaps:
- Ready-to-manufacture Gerbers and drill files have not been verified.
- A complete matching enclosure design has not been verified.
- Firmware source and flashing instructions need review.
- Hardware notes and source projects are published, but a complete assembly and test procedure has not been reviewed.

Source archives and firmware:
https://github.com/usbarmory/usbarmory/archive/38577709d7b720c7ea6e9c0b515afa10746f3c2b.zip

Upstream licence: CERN-OHL-S-2.0
https://github.com/usbarmory/usbarmory/blob/38577709d7b720c7ea6e9c0b515afa10746f3c2b/hardware/mark-two/LICENSE

Catalogue: https://gadgets.sh/devices/usb-armory-mk-ii/
