Encapsulate required data types in at_onboarding_flutter

[ralfeus]

Which at_widget package you find issue with?

at_onboarding_flutter

On what platforms did you experience the issue?

Android, iOS, Windows, MacOS, Linux

What version are you using?

at_onboarding_flutter: 5.0.5

What happened?

AtOnboarding.onboard() requires a config parameter of type AtOnboardingConfig, which is a part of at_onboarding_flutter package. Its constructor requires in its turn atClientPreference parameter of type AtClientPreference. This type is not a part of at_onboarding_flutter nor exposed by one. So it's hard to figure what else should be added to dependencies to make the project running.
I recommend to expose AtClientPreference by at_onboarding_flutter package

Steps to reproduce

1. Create widget from example:

  Widget build(BuildContext context) {
      final atClientPreference = AtClientPreference();
      return TextButton(
      onPressed: () async {
        final result = await AtOnboarding.onboard(
          context: context,
          config: AtOnboardingConfig(
            atClientPreference: atClientPreference,
            domain: 'atkrypto.io',
            rootEnvironment: RootEnvironment.Testing,
            appAPIKey: AtEnv.appApiKey,
          ),
        );
    }

2. Observe impossibility to compile
...

Additional info

No response

Relevant log output

No response

Flutter analyze output

No response

Flutter doctor output

No response

[ksanty]

Is this a documentation update @sachins-geekyants

[sonle-geekyants]

#594 This is my PR, please check it @sachins-geekyants @ralfeus

[sachins-geekyants]

Fix released in at_onboarding_flutter: ^6.0.1