feat(skills,tty,openamp): multi-marketplace support, table wrapping, fuzz consolidation
- skills: support multiple marketplace dirs (monopam + ocaml-claude-marketplace),
auto-discover local checkouts and plugin cache, --marketplace flag repeatable
- tty: shrink table columns to fit terminal width, wrap paths on '/' boundaries
- openamp: merge fuzz_firmware.ml and fuzz_remoteproc.ml into fuzz_openamp.ml (E710)