feat(pilotctl): complete help coverage, drop --show-endpoints

Help system:
- Add help text for all user-facing commands: pending, trust, trusted, untrust,
  reject, approve, deregister, rotate-key, set-public, set-private, set-hostname,
  clear-hostname, set-webhook, clear-webhook, connections, disconnect, received,
  dgram, config, version, updates, context, skills, network (full subcommand list),
  broadcast, subscribe, publish, send-file
- Update peers/info/health/daemon-status help to reflect new fields (relay, beacon,
  queue drops, PATH column)
- Fix duplicate map keys (approve, register, lookup, network)

Privacy / UX:
- Remove --show-endpoints from peers, info, and lookup — endpoints are always
  redacted; no flag needed
- peers output simplified: no branch on showEndpoints, always clean columns

Author: teovl