Allow LibreAutomate documentation to be served locally using "docfx serve"

[dksyks]

I obviously don't know whether you are interested in this contribution. My motivation is that I don't like the code upon which I have built something to get upgraded and thereby break what I have made unless I have lots of time on my hands. The problem with online documentation is that it advances and no longer corresponds to what I have on my system. So I don't much like it either. At least not as a primary source of documentation. So I have been hesitant to adopt LA, or really any code, where I don't have an easily accessed local copy of the documentation.

Maybe it is just me.

Anyway, in this pull request I have setup LA to use a local copy of the documentation specific to the build that is running. To do so, I have...

1. Created an LA workspace that just encompasses the \scripts directory. I suspect you used LA for the whole solution in parallel with visual studio but I wanted a more circumscribed view in LA of just the scripts. This is located in the directory \LA.Workspace.For.Scripts. There is a readme.txt file in that directory to describe how to setup the workspace for the uninitiated (me).
2. Rewrote the main scripts in Au docs.cs to make the information flow a little more clear (to me).
3. Added several settings to AppSettings.cs
4. Added a tab in DOptions.cs for Tools --> options. Tab is called Docs and is for adjusting the settings in AppSettings.cs.
5. Added a private function in HelpUtils that calls docfx.exe serve if needed and shuts it down when LA exits if local documentation is turned on.

To make the code more universally useful, either the docs would need to be included in the installation program (7MB compressed) or they would have to be downloaded on demand. Then of course docfx would need to be present (70 MB downloaded). I did not address this as I have my copy and I am not too sure you are going to incorporate these changes.

[dksyks]

a picture is worth a thousand words:

and

[qgindi]

Thank you. Next LA will have option to use local documentation of the installed LA version: Options > Other > Documentation. Already implemented in the last git commit. It uses a simple built-in HTTP server instead of docfx. Auto-downloads the documentation archive for that LA version from the LA website, where it is uploaded by the Au docs script.