Request for new text animation

Having a modern and beautiful text fade animation like that would be a great addition to the already great set of effects

https://codepen.io/alvarotrigo/pen/ExvqdNa

Look at existing text animation widgets in the lib/ directory to understand the pattern. The Codepen link shows the desired animation effect. Implement a new widget following the same structure, likely involving custom painting or implicit animations. Test it in the example app to ensure it matches the reference.

Written by the indexing model from the issue text.