DOC: Add Visible Table of Contents to Project README Documentation
- [x] closes #53503 

I have added a table of contents to the projects main README markdown file on my feature branch. I applied the same header styling to match the rest of the README. I tested the links on my branch and it all works. 

I typically look for a table of contents on READMEs and I find it to be a valuable resource so I wanted to provide a suggestion to the issue I opened referenced above.
Great thanks @ssharp0 