Ki-Stack v0.1.0

Initial public release of Ki-Stack.\n\nHighlights:\n- Phase 1 substrate skills for render, live IPC, file surgery, and verification\n- Phase 2 domain skills for PCB, schematic, symbols, and footprints\n- Helper scripts for KiCad CLI, ERC/DRC JSON, version checks, and OpenCode installation\n- Copy-paste Python IPC examples for common board workflows