devel/prjpeppercorn112: Add new port
This port is used by devel/nextpnr* to produce configuration bitstreams for
CologneChip GateMate FPGAs.
Notes:
- This port is versioned because of version compatibility requirements with
devel/nextpnr*
- The timings tarball is mirrored because upstream currently does not provide
a versioned archive/URL