sphinx/conf.py: Include apidoc in toc of swh package doc index
When building the full swh documentation, add a post-transform step to include a swh package apidoc in the toc of its documentation index page.
Fix #4736 (closed)
When building the full swh documentation, add a post-transform step to include a swh package apidoc in the toc of its documentation index page.
Fix #4736 (closed)