Plugin command and hook dispatch now track an origin/rootEvent chain

What

• The plugin $.command.run call changed its signature to accept a destructured {origin, rootEvent} object (instead of positional arguments), and now registers the queued command's origin and root event before dispatching it.
• Plugin hook dispatch bookkeeping now also records a rootEvent and a new isPersonInput flag alongside the existing turnHeld field.

Why This lets Claude Code trace a command or hook dispatch back to the event that originally triggered it, which is groundwork for more accurate attribution of actions within a session.