v0.8.0 — dynamic CLI command suggestions

Added

• Dynamic command suggestions — every query command now ends with context-aware
  next steps, with your own argument spliced in: after find login it suggests
  sens who login / sens explain login; after dead-code it points at
  sens who <candidate> to confirm before deleting. When a query finds nothing, the
  suggestions turn into help instead of a dead end (e.g. find with no match nudges you
  to sens exists <keywords> or to reindex). Terminal-only — nothing here reaches the
  model over MCP or the hook.