fix(shorebird_cli): shorebird init flavor detection progress (#550)

packages/shorebird_cli/lib/src/commands/init_command.dart

@@ -74,7 +74,7 @@ If you want to reinitialize Shorebird, please run "shorebird init --force".''');
       productFlavors = await extractProductFlavors(Directory.current.path);
       detectFlavorsProgress.complete();
     } catch (error) {
-      detectFlavorsProgress.fail();
+      detectFlavorsProgress.complete();
       logger.detail('Unable to extract product flavors: $error');
     }
 

packages/shorebird_cli/test/src/commands/init_command_test.dart

@@ -328,6 +328,8 @@ If you want to reinitialize Shorebird, please run "shorebird init --force".''',
           'Unable to extract product flavors: Exception: error\noops',
         ),
       ).called(1);
+      verify(() => progress.complete()).called(1);
+      verifyNever(() => progress.fail(any()));
       expect(exitCode, ExitCode.success.code);
     });