feat(python): implement session based trezorctl

[no changelog]

python/src/trezorlib/cli/__init__.py

@@ -267,6 +267,11 @@ class TrezorConnection:
                     empty_passphrase=empty_passphrase,
                     must_resume=must_resume,
                 )
+        except exceptions.DeviceLockedException:
+            click.echo(
+                "Device is locked, enter a pin on the device.",
+                err=True,
+            )
         except transport.DeviceIsBusy:
             click.echo("Device is in use by another process.")
             sys.exit(1)