Documentation

[csharpfritz]

We need to start a docs folder that will eventually publish to a website for developers who want to use this project

[derekforeman]

This issue looks to be related to, https://github.com/FritzAndFriends/StreamDeckToolkit/issues/107.

Perhaps close it in favor of following the above related issue?

[AlexHedley]

@csharpfritz #107 mentions ReadTheDocs, do you have a preference for which docs lib is used, i.e. MkDocs or DocFX etc

I recently built a workflow with GitHub Actions to get DocFX building nicely and deploying to GH Pages, plus we can also produce API docs.