CLI: Approve for Me, Subcommand Approval Rules, and an ACP Engine Setting

This release adds Approve for me to interactive V3 sessions. Kiro approves routine actions for you, blocks risky ones, and asks when unsure, so work no longer stops at every routine prompt. Existing deny, ask, and allow rules decide first; Approve for me handles only unsettled actions and marks each action it approves Approved for you. Turn it on under /permissions when available.