- Remove nextpnr-gowin; replaced by Gowin support in nextpnr-himbaechel
- Remove unmaintained FPGA interchange support
- Updated and reworked CMake build system
- Himbaechel: Numerous improvements to Gowin support
- Himbaechel: Added experimental NanoXplore NG-Ultra support
- Himbaechel: Added APIs and data structures for GUI support
- STA: Support for hold time analysis