build: add autodoc to sphinx extension list

Build python class docs for packaged docs.

Author: rouilj

doc/conf.py

@@ -51,7 +51,7 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 #extensions = ['toctree']
-extensions = ['sphinx_tabs.tabs']
+extensions = ['sphinx_tabs.tabs', 'sphinx.ext.autodoc']
 
 sphinx_tabs_valid_builders = ['linkcheck']
 sphinx_tabs_disable_tab_closing = True