documentation/source/conf.py: Auto API docs generation

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
documentation: Remove rst API docs for auto generation

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
documentation/Makefile: Clean auto generated rst files
documentation/source/index.rst: Add auto generated entry point

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>