SolidRun MACCHIATObin ATX cover

Cover for a SolidRun MACCHIATObin to fit into an ATX (Mini-ITX) case.

Fit tested with Rosewill RS-MI-01, printed in PETG with a Prusa MK3.

Note that this only fits the Revision 1.2 boards, not the 1.3. Once I get my hands on a 1.3 I'll provide a cover that fits those as well.