This PR includes:
- A fix for a recently introduced issue wrt. error handling
- Added integration tests for provoked errors
- Influence standard return values using aci library for aci_rest
- Add proxy support documentation
- Documentation update related to #34175
* Docs refactor as outlined in https://github.com/ansible/proposals/issues/79. Moves content into 'guides'; refactors TOC; fixes CSS; design tweaks to layout and CSS; fixes generated plugin, CLI and module docs to fix links accodingly; more.
* Adding extra blank line for shippable
