Creating docs for React Training

[mxrcochxvez]

Changes

1. Creating Docs for React Training.

Purpose

The purpose of this PR is to add more information about using React/React Native and referencing important features of the Library.

Learning

For this PR I had to research the exact definitions of each method and keyword that the library uses as well as determining the most useful changes between ES5 and ES6 to include in the document as well as making sure that encouraging Functional components was just as important as showing how similar problems would be solved with Class Based Components.

Here are some documents I referenced

• https://medium.com/edonec/state-in-react-an-overview-a182675cee2c
• https://github.com/uberVU/react-guide/blob/master/props-vs-state.md
• https://reactjs.org/docs/getting-started.html
• https://www.w3schools.com/tags/tag_button.asp
• https://www.better.dev/react-prerequisites

Closes #302

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[mxrcochxvez]

@mxrcochxvez Thanks for adding to our processes!

Always assign pr-team to your PRs, per our code review process. Assign your PRs to @Shift3/pr-team in addition to the main devs on this project. This will automatically grab three developers from the PR team and assign them to perform a review. This will help to get a quicker turnaround on your reviews, and will also help this project to get reviews and feedback from team members with different perspectives and skill levels.

Thank you Michael! I went ahead and did this.