Publish full API documentation

[tristanlatr]

Hello,

It would good to publish the full astroid reference in the documentation, not only the classes, but the AstroidBuilder and other important building blocks.

In the mean time, I've generated the full API reference here: https://tristanlatr.github.io/apidocs/astroid/astroid.html

[DanielNoord]

A lot of the functions and modules there are "Undocumented". What does such a reference offer compared to just docstrings in the code?

[tristanlatr]

I find it much more efficient to skim throught the documentation than the code.
All inherited methods/attributes are listed on the classes page, which is very helpful when starting using astroid.

Some classes/modules are pretty well documented, I think it would be great to honour the docstring writers by generating HTML from their documentation.

Helpful pages for an astroid beginner:

astroid.nodes package documentation: https://tristanlatr.github.io/apidocs/astroid/astroid.nodes.html
AstroidBuilder class documentation: https://tristanlatr.github.io/apidocs/astroid/astroid.builder.AstroidBuilder.html
AstroidManager class documentation: https://tristanlatr.github.io/apidocs/astroid/astroid.manager.AstroidManager.html
astroid.helpers module documentation: https://tristanlatr.github.io/apidocs/astroid/astroid.helpers.html

[Pierre-Sassoulas]

I'm clearing the milestone so we can release astroid 2.10, this is not strictly necessary.