Add "Highly Subjective Roadmap to Flutter"

[olexale]

You've read How to contribute right ? sure

So tell me more about your awesome contribution and add the badge to your repo after it's accepted :D

I created a visual scheme with step-by-step guidance for Flutter newbies and I hope it might be useful for the community.

<a href="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/Solido/awesome-flutter">
   <img alt="Awesome Flutter" src="https://img.shields.io/badge/Awesome-Flutter-blue.svg?longCache=true&style=flat-square" />
</a>

[renancaraujo]

[lucalves]

This is really useful.

[Solido]

Beginners section was very old. Your document is nice and nearly complete !!!