GuideController class

A comprehensive onboarding system for Flutter applications that guides users through new features using overlays and tooltips.

This system allows you to highlight specific widgets in your existing UI and provide contextual information about features without requiring major code changes.

Example usage:

final controller = GuideController();
final steps = [
  GuideStep(
    targetKey: _buttonKey,
    title: 'New Feature',
    description: 'This button has new functionality.',
  ),
];
controller.startGuide(steps);

Controls the onboarding flow, managing steps, navigation, and overlay display.

The controller handles the state of the onboarding process and provides methods to navigate between steps, skip the onboarding, or finish it.

Usage:

final controller = GuideController();
controller.addListener(() {
  // React to onboarding state changes
  if (!controller.isActive) {
    print('Guide completed');
  }
});