Refactor entry point

[timmens]

In this PR, we want to refactor the entire entry point.

We implement a model blocks class that provides methods that return all the previously defined functions in the entry point.

Warning

This is highly preliminary and does not work yet. My conclusion for now is that the refactoring step that was originally planned is too large. I have to start with a smaller refactoring that is closer to the current implementation.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.30%. Comparing base (56f244d) to head (963925b).

❗ Current head 963925b differs from pull request most recent head e78bb98. Consider uploading reports for the commit e78bb98 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #57   +/-   ##
=======================================
  Coverage   98.30%   98.30%           
=======================================
  Files          42       42           
  Lines        2415     2415           
=======================================
  Hits         2374     2374           
  Misses         41       41           

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