Introducing AnimatedTextController for animation control.

[oriventi]

Summary

This pull request introduces a new AnimatedTextController to make it possible to control animations in AnimatedTextKit. The controller provides methods like play(), pause(), and reset(), and manages the animation state internally, including handling and respecting the pauses between animations.

Features

• The controller manages animation states without exposing the AnimationController directly
• Introduces new states to handle user pauses and between-animation pauses
• Allows programmatic control of animations and also simplifies state management

final controller = AnimatedTextController();

AnimatedTextKit(
  animatedTexts: [
    FadeAnimatedText('Hello'),
    FadeAnimatedText('World'),
  ],
  controller: controller,
);

controller.pause();

controller.play();

controller.reset();

Additional stuff

• I updated the example app to make use of the AnimatedTextController too.
• I added tests for the controller

Fix

It fixes #346 and fixes #337

[JulienElkaim]

Great add ! However, it seems the project is dead since 2 years... ? :/
Would be great to have an alternative with active support.

[queendevelopers]

PR looks good except for the naming convention for enums.