Add prototype for publishing docs to github-pages

[Mr-Geekman]

Before submitting (must do checklist)

• [x] Did you read the contribution guide?
• [x] Did you update the docs? We use Numpy format for all the methods and classes.
• [x] Did you write any new necessary tests?
• [ ] Did you update the CHANGELOG?

Proposed Changes

Add multi-version documentation on GitHub Pages.

Closing issues