switch --list
* cmd/tailscale/cli: add json output option to `switch --list` Closes #14783 Signed-off-by: Cameron Stokes <cameron@tailscale.com>
updates #13583 Signed-off-by: Cameron Stokes <cameron@tailscale.com>
Fixes tailscale/tailscale#12842 Signed-off-by: Cameron Stokes <cameron@cameronstokes.com>