LWMadmin Agent for macOS

Create a new Agent in the authenticated LWMadmin cabinet and copy the generated
command that matches this Mac hardware architecture:

  arm64   Apple Silicon (M1/M2/M3/M4 and later Apple Silicon)
  x86_64  Intel Mac

The archive contains two native executables:

  lwmadmin-agent   outbound service running as _lwmadmin
  lwmadmin-broker  local root-only privileged broker

Run the generated command unchanged. It verifies the hardware architecture,
preserves an existing node/device credential during upgrade, installs both
LaunchDaemons and verifies the local broker before starting the outbound Agent.

The development/CI artifact is unsigned unless the release pipeline has Developer ID
signing and notarization credentials configured.
