34267d5afa
Rather than printing `unknown subcommand: drive` for any Taildrive commands run in the macOS GUI, print an error message directing the user to the GUI client and the docs page. Updates #17210 Fixes #18823 Change-Id: I6435007b5911baee79274b56e3ee101e6bb6d809 Signed-off-by: Alex Chan <alexc@tailscale.com>