Improve project README

[pleshakov]

Proposed changes

Problem:
Project README is empty

Solution:
Add content to project README.

CLOSES #6

Note:
How to use the project - that will be added in #5

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING
  guide
• I have proven my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have ensured the README is up to date
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch on my own fork