GitHub repository revamping

[datejada]

We need to address the following points to improve the package:

• [ ] Add documentation with a more comprehensive tutorial
• [ ] Include fixes to pass the tests in the package
  • [ ] Update the test in the folder
  • [ ] Fix de CI because it is not working (we need to review the configuration)
  • [ ] The documentation test also fails (there is no documentation page; do we include it?)
• [ ] Set up the compatibility helper bot (also review the current compatibilities)
• [ ] Changes to make it work with the current version of SpineOpt/SpineInterface (?)
• [ ] Give defaults to parameters to avoid errors (e.g., window_duration)
• [ ] #10
• [ ] Implement Codecov to guarantee that the testing of the code
• [ ] Review current issues (priority, label, etc.)
• [ ] Enable the discussion section in the repository

[manuelma]

I think the tests fail just because it cannot install spinedb_api...

Also I think it already works with the latest version of SpineOpt/Interface, or at least I have tried to keep it that way.