Doc update to match refactored code

[Shi-Ho]

Overview

• Update workflows so it now check on all branch if doc could be built
• Added new features to doc
• Update doc settings to fit refactored code

Issue Reference:

- #89

Changes Made

- Added .github/workflows/sphinx-test.yml
- Rename .github/workflows/ci-sphinx.yml tp .github/workflows/sphinx-deploy.yml
- Update doc/conf.py
- Update doc/guidelines/sphinx.rst
- Update doc/topics/autocomplete/index.rst
- Update doc/topics/indexing/index.rst
- Update doc/topics/rag/index.rst

Testing

None

Screenshots

None

Additional Notes

I'm not sure it works because I couldn't download the package pyxDamerauLevenshtein, it's requesting some C++ compilator and I haven't looked into how to download it yet.

It is building fine when I'm commenting the import for this package though.

Also, is the "change mades" section in this form really useful since there's a "files changed" tab in the PR?

Requested Reviewers

@tabee @K-Schubert

[tabee]

Maybe rename the workflow from sphinx-test to sphinx-docs or something...