fix: log unknown errors to err instead of detail (#2545)

packages/shorebird_cli/lib/src/shorebird_cli_command_runner.dart

@@ -210,7 +210,7 @@ Engine • revision ${shorebirdEnv.shorebirdEngineRevision}''');
         return ExitCode.usage.code;
       } catch (error, stackTrace) {
         logger
-          ..detail('$error')
+          ..err('$error')
           ..detail('$stackTrace');
         exitCode = ExitCode.software.code;
       }

packages/shorebird_cli/test/src/shorebird_cli_command_runner_test.dart

@@ -272,7 +272,7 @@ Engine • revision $shorebirdEngineRevision''',
         await runWithOverrides(
           () => commandRunner.run(['release', 'android', '--verbose']),
         );
-        verify(() => logger.detail(any(that: contains('Bad state')))).called(1);
+        verify(() => logger.err(any(that: contains('Bad state')))).called(1);
         verify(() => logger.detail(any(that: contains('#0')))).called(1);
       });