text: Title: Add Python API documentation / Module reference to the documentation/website
  Body: **Is your feature request related to a problem? Please describe.**
  As explained in #996
  
  dynaconf 2.2.3 has a [Module reference](https://dynaconf.readthedocs.io/en/docs_223/reference/dynaconf.html#) where I can read see all the methods of dynaconf.LazySettings together with a description.
  
  I don't see anything similar in https://dynaconf.com/ , @rochacbruno, confirmed that 
  > Hi, since we migrated to mkdocs there is **no API reference documented**, there is a mkdocs plugin that can generate that we just need to setup it.
  
  **Describe the solution you'd like**
  @rochacbruno  and @pedro-psb  mentioned that there is a mkdocs plugin called [mkdocstring](https://mkdocstrings.github.io/)
  that can be used to generate that kind of api documentation . 
  
  So I guess this mkdocs plugin should be configured/setup/included in the pipeline that generates the website
  
  
  