Added Developer Documentation v1

[King-Mob]

What? Why?

Closes #200

Added an intro.md file to the /docs folder on the front-end. This can be reviewed by anyone.

What should we test?

• Visit this page on github: https://github.com/DigitalCommons/land-explorer-front-end/tree/development/docs
• Click on intro and github should render it

Release notes

Deployment notes

None

[lin-d-hop]

Cool. This is a great starting point. Now we need to onboard someone to test it ;)