Feature: Add Table of Contents to README

[AnnaDodson]

TOC to README, see post: https://github.blog/changelog/2021-04-13-table-of-contents-support-in-markdown-files/

It would also be nice to have a proper TOC at the start of the page

SEE:

• https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet#table-of-contents

[sdh100shaun]

the readme suggests using TOC functionality but needs a bit better layout too I feel
The workflows and actions can be separated to sections and the Meta information version etc could be a badge?