Feature/documentation

Description

Improve code standards and add documentation skeleton

• Implement pre-commit hook with black and pylint
• Add documentation structure for sphinx
• Update CI template to include documentation generation and deployment to GitLab pages.

Related Issue

Closes #6 (closed) #8 (closed)

How Has This Been Tested?

Tested in CI. Generated documentation available at http://cta-computing.pages.cta-observatory.org/dpps/calibrationpipeline/calibpipe

Note: currently notebooks are not working properly, they must be fixed in the future MR (@georgios.voutsinas)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.