Adds _set_process_title() in hermes_cli/main.py, called first thing in
main(). Tries setproctitle (optional) for a full ps-args rewrite, then
falls back to ctypes prctl(PR_SET_NAME) on Linux / pthread_setname_np on
macOS. No-op on Windows and on any failure. No new dependency: the
setproctitle path is best-effort via ImportError guard.
Fixes#35108
