Added "image-sequence-animator" to UI

As requested, I am resubmitting this pull request with the conflicts resolved because apparently I've already removed the previous fork from my repos.

Author: aliyigitbireroglu

source.md

@@ -148,6 +148,7 @@ If you appreciate the content 📖, support projects visibility, give 👍| ⭐|
 - [Direct Select](https://github.com/LanarsInc/direct-select-flutter) - Selection widget with an ethereal, full-screen modal popup by [Ivan Yatsouba](https://github.com/iyatsouba).
 - [Before After](https://github.com/xsahil03x/before_after) <!--stargazers:xsahil03x/before_after--> - Beautiful slider which makes it easier to display the difference between two images, by [Sahil Kumar](https://github.com/xsahil03x).
 - [Scratcher](https://github.com/vintage/scratcher) <!--stargazers:vintage/scratcher--> - Scratch card widget which temporarily hides content from user, by [Kamil Rykowski](https://github.com/vintage).
+- [Image Sequence Animator](https://github.com/aliyigitbireroglu/flutter-image-sequence-animator) <!--stargazers:aliyigitbireroglu/flutter-image-sequence-animator--> - A simple widget for animating a set of images with full custom controls as an alternative to using a GIF file by [Ali Yigit Bireroglu](https://github.com/aliyigitbireroglu).
 
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