Expose SDK permission request details on approval-requested events via a
new permissionDetail payload. This preserves the existing title/detail
summary while carrying the command, URL, diff, args, and other
kind-specific data needed for richer approval UI in the renderer.
Also adds sidecar coverage for all supported permission request kinds and
verifies the new payload serializes over the protocol.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
