Add docs, JsonApi file and tests. Hide API key in gh secrets. Create push and pull github workflows.

[DavideGCosta]

• Changed jsonApi.fsx methods in order for the output to be only in raw JSON, and included [<RequireQualifiedAccessAttribute>] to unions .
• Fixed index.fsx and UnitsTest1.fs to work with the raw JSON outputs.
• Added sample.fredKey.json and fredKey.json to .gitignore.
• Created the workflows:
  • pull-requests.yml, everything seems to work fine here.
  • push-master.yml, here I had to remove --strict from the fsdocs command line because it was returning error1, I spent some time looking for possible solutions and tried multiple stuff but nothing really worked.
• Also removed unnecessary fsx files.

[nhirschey]

This looks great! I'll merge this in.

Please see the changes in each of my commits so that you can see what I did. It's mostly minor cleanups but it's good for you to see so that you'll know next time.