Export Sphinx-Generated Documentation to Read the Docs

[BaptisteLacroix]

Description:
Our documentation is already generated using Sphinx and deployed via GitHub Pages. We now want to also publish it on Read the Docs to take advantage of:

• Automatic builds on push
• Versioned documentation per branch/tag
• Improved discoverability and hosting stability

Acceptance Criteria:

• Create a Read the Docs project linked to our repository.
• Ensure conf.py and requirements.txt contain all dependencies needed for the build.
• Add a .readthedocs.yaml file in the repository root to configure the build.
• Verify the documentation builds successfully on Read the Docs.
• Confirm the public Read the Docs URL is working and in sync with our GitHub Pages version.
• Enable versioned builds to match our tagged releases.

Usefull resources

• https://docs.readthedocs.com/platform/stable/builds.html
• https://docs.readthedocs.com/platform/stable/config-file/index.html
• https://docs.readthedocs.com/platform/stable/intro/add-project.html#automatically-add-your-project
• https://docs.readthedocs.com/platform/stable/reference/git-integration.html