Separate out ExperimentConfig, update docstrings

[nefrathenrici]

Purpose

To-do

Content

---

• I have read and checked the items on the review checklist.

[codecov]

Codecov Report

Attention: Patch coverage is 53.84615% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 39.66%. Comparing base (0004175) to head (f73ac0a).

Files	Patch %	Lines
src/ekp_interface.jl	58.33%	5 Missing ⚠️
src/slurm.jl	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #90      +/-   ##
==========================================
+ Coverage   39.09%   39.66%   +0.57%     
==========================================
  Files           7        7              
  Lines         243      242       -1     
==========================================
+ Hits           95       96       +1     
+ Misses        148      146       -2     

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