Auto-generate README from docs

[pling-scottlogic]

Background

In #109, we found a way to use GitHub actions to auto-generate a README file from a specified list of markdown files in the project repo. We now need to productionise this proof of concept.

Work Required

• Add the following files from the prototype branch (SLVUU109-combine-docs):
  • generate-readme.sh
  • generate-readme.yml
  • readme_contents.txt
• Change any references to README_AUTO.md with README.md
• Edit readme_contents.txt to specify the intended list of files to be included
  • ❓ Which files/folders are to be included?
• Edit generate-readme.yml to generate any further commentary/intro that may be required

Notes

If it is neccessary to include a significant amount of markdown content to the README that is not intended for the Docusaurus site, this can be written in .md files stored outside of the docs folder, and referenced in readme_contents.txt.

[pling-scottlogic]

Cannot proceed until we know what content is required for the README. Draft PR raised into Finos repo as handover.