Extract _select_rules() helper from quick_crack/loopback_attack and wire
it into omen_attack so OMEN can run with rule chains. Extend hcatOmen()
to accept and apply an hcatChains argument including debug mode injection.
Fix resolve_path() to honour HATE_CRACK_ORIG_CWD (set by the install shim)
so relative hash/wordlist paths resolve against the caller's working directory
instead of the repo root. Increase default omenMaxCandidates to 50M.