Plan refactoring of pyIRI2016

[rilma]

This issue aims for planning a comprehensive refactoring of pyIRI2016. Community is welcome to be part of the discussion. Topics to be considered are:

1. Improvements / refactoring of CI/CD pipelines
   1.1. Moving to Github Actions as CI/CD execution environment
   1.2. Build Docker image and publish to a public/private repository (e.g. Docker Hub/Cloud, Github Packages)
   1.2.1Ansible could come in to rescue us!!!
   1.3. Build Python package (perhaps with poetry) and publish to a public repository (e.g. PyPI)
2. Improvement / refactoring / planning of unit-testing cases
   2.1. Comprehensive testing cases through pytest
3. Improvement of documentation
   3.1 Release a CHANGELOG
   3.2 Perhaps with MkDocs and publication through Github Pages
4. Automate updates of Fortran code and coefficients from the original sources
   4.1 Retrieval of Fortran files and dependencies
   4.2 Through automated pull requests thus repository always includes the latest version of Fortran code and coefficients.
   4.3. Official Fortran source code is available here.
   4.4. Common files (e.g. CCIR and URSI coefficients) can be obtained from this link.
   4.5. Solar and magnetic indices can be found in this link

Serve yourself and please share comments / ideas ...