feat: ✨ add animation option to `setPage()` method for Android

[moazelsawaf]

Hi there 👋🏻

Thank you for making and maintaining this awesome plugin, which is helping the Flutter community grow more and more 💙

In this pull request, I have added an animation option to the setPage() method for Android. This allows users to jump to the required page with a transition animation ✅

Here are some details about the feature:

• The feature is currently only supported for Android, as the native iOS dependency does not provide an option for this.
• The feature has been documented in the README file and inside the code with Dart doc comments.
• The feature can be enabled or disabled by a parameter called withAnimation in the setPage() method. The default value is false.
• The feature has been implemented with backward compatibility in mind, so there are no breaking changes. The new parameter has been added as an optional parameter after the old required positional one.

I hope you like this feature! 💙

Thanks 🙏🏻💙

[moazelsawaf]

Hi @endigo 👋🏻

It has been a long time since this PR, can you please review it and give me your feedback 🙏🏻