include API documentation and Guide (v4).

[alec1o]

Is your feature request related to a problem? Please describe.

the docs of project is manual and maybe can have errors on api. and is hard mantain manual wrote, for fix that should consider include tools to generate api from sources using XML comments.

Describe the solution you'd like

A clear and concise description of what you want to happen.

Describe alternatives you've considered

1. Found tools to generate docs from XML comments.
   • 1. DocFx is most easy way to do this! (Most better choice)

Additional context

If the choice is DocFx

• 1. the guide must be rewrite. (current version don't have guide)

[alec1o]

C# API generation is working: 0fe42cea0e08e789b02bdc7725a73a254f43c8d4