✨ Simple generator for model and parameters for use in testing

[jsnel]

Simple generators

Models and parameter schemes are typically either defined as a yaml file or as (in-line) dictionaries alongside Python code. For obvious reasons the test files (test_*.py) are full if in-line model definitions, and often multiple that are very similar. For instance, a one compartment decay, with and without dispersion, or a two or three compartment decay are all similar and have a lot of (boilerplate) in common. This not only results in code (dict definitions) duplication, but also in hard-to-read tests since the variation between model or parameter schemes are often quite subtle. Also because of this typo's and/or copy paste mistakes are luring around every corner. A simple generator for model and parameters can help with this.

Describe the solution you'd like

A simple generator, designed as a dataclass, that can generate a model or parameter scheme based on 'starting values' assigned to its fields.

Describe alternatives you've considered

We have attempted yaml reference nesting for a while but that did not improve readability much (see e.g. test_spectral_irf.py)

Additional context

Within the pyglotaran project feature there is also a need for simple generator, perhaps the functionalities can be merged at some point.

[jsnel]

This has been resolved with the #807 PR which was merged into main in #778.

A follow up issue has been created in #815.