Update Bin2Dec-App.md

Adding a solution built with Dart & Flutter, with a live preview built with Flutter for Web.

Projects/1-Beginner/Bin2Dec-App.md

@@ -40,3 +40,5 @@ Try not to view this until you've developed your own solution:
 -   [Binary to decimal conversion program for beginners](https://www.youtube.com/watch?v=YMIALQE26KQ)
 -   [Binary to Decimal converter using React](https://github.com/email2vimalraj/Bin2Dec)
 -   [Binary to Decimal converter with plain html, js and css](https://grfreire.github.io/Bin2Dec/)
+-   [Binary to Decimal converter using Flutter & Dart](https://github.com/israelss/AppIdeasCollection/tree/master/Tier1/Bin2Dec)
+    -   [Live preview built with Flutter for Web](https://bin2dec.web.app/#/)