feat: Add Brief Description to Start of README

[JacobKnickerbocker]

Description

I added a description to the beginning of the README for newcomers who may not necessarily understand what this project is. I made an issue (#2679 ) to describe this as well.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as before)

Checklist

• Read the Contributing Guide
• Perform a code self-review
• Comment the code, particularly in hard-to-understand areas
• Add documentation
• Add hook's story at Storybook
• Cover changes with tests
• Ensure the test suite passes (yarn test)
• Provide 100% tests coverage
• Make sure code lints (yarn lint). Fix it with yarn lint:fix in case of failure.
• Make sure types are fine (yarn lint:types).

[JacobKnickerbocker]

@streamich Just letting you know this is here! No rush!