Add docs

[Kameshwaran]

• docs that works with mdx
• Example code should be placed for all the components
• Example code should be editable, copiable and executable.

Design can be inspired from Priceline. Codesandbox and Codepen links are plus.

[Kameshwaran]

https://5e7cb17d190c690007ea31ea--brickscb.netlify.com/button