Add Contributing Guidelines & README file
Hi Contributors!
I am Tushar Ojha, a Flutter & Android Developer. I found this project interesting and the way it combines both Flutter's UI capability & Android's Compatibility. I would like to contribute to this project but currently, there is no CONTRIBUTING file or a README file. So, I would like to know if this project is open to new contributors. If yes, then I would like to contribute to this project and looking for the contributor's guidelines & tips.
Best Regards