Feature/documentation Github Actions

[rcmalli]

Summary

• We introduce Github actions for automatically build and deploy documentation after merge happens to main and dev branches.
• This PR also fixes the broken links inside the documentation website and README.md file.
• It also updates required dependencies for building documentation.

Type of Change

Please select the one relevant option below:

• Bug fix (non-breaking change that solves an issue)
• New feature (non-breaking change that adds functionality)

Checklist

Please confirm that the following tasks have been completed:

• I have tested my changes locally and they work as expected. I run the mkdocs serve and checked the links
• I have added unit tests for my changes, or updated existing tests if necessary.
• I have updated the documentation, if applicable.
• I have installed pre-commit and run locally for my code changes.

[lorenzomammana]

LGTM