Create custom Flutter Widget

[RushiDonga]

Hey guys, If you want to contribute to this project, make sure to go through CONTRIBUTING.md file🎯

After making an awesome custom Flutter Widget, give us a pull request and we will review it within a day and
merge it if there will be no problem🙌

Happy hacking🚀

[sidB67]

Hi I have made a pull request. Will you mark it with hacktoberfest at that time only?