Create 33.react-fragments.md

[Eli017]

Created guideline for React Fragments

• React fragment solution/guidance was requested within issue Is there any solution or practice for 2127 issue? #69.
• This file provides guidance for when to use <React.Fragment> and how to use it within a project.
• There are also reference links to the official React documentation website.

[Eli017]

This is my first PR to an open-source project, I hope it helps!

[vasanthk]

@Eli017 Congrats on your first contribution. Thank you for sending this PR :)