[FR]: Support Rive version >=0.14.0

[JulianBissekkou]

Is there an existing issue for this?

• I have searched the existing issues

Describe the problem

Rive changed its API with the recent 0.14.0 release.
The generated code for Rive file needs some adjustments.

Describe the solution

Migrate to the new API

Additional context

https://rive.app/docs/runtimes/flutter/migration-guide#version-0-14-0

Code of Conduct

• I agree to follow this project's Code of Conduct

[AlexV525]

It seems that the v0.14 is still under prerelease. We'll reevaluate once it reaches stable. Feel free to ping when it does.