fix(lint): resolve E718 missing gen_corpus.ml and E720 multiple fuzz stanzas
Add gen_corpus.ml with domain-appropriate seed data for hap, homebrew,
hostname, json-logs, jsonwt, ltp, and matter fuzz directories. Merge
matter's two fuzz executables (fuzz_tlv, fuzz_case) into a single fuzz
runner via fuzz.ml wrapper.