Fh/weeeee

[teutoburg]

This factors out the wheel-type data structure found in multiple effects. Branch was from 2-3 months ago actually, now found it again and rebased (#500 had to go before). Not sure if I'm quite happy with how this turned out, perhaps after going full dataclass effects I might turn WheelEffect into a subclass of Effect (conceptually more reasonable), but that's for later. The wheels were anyway a major roadblock for the dataclasses, so to keep the PRs at a reasonable size, I decided to make this change separately, as it can (mostly) exist on its own.

Perhaps I'll keep this as a draft until #494 is merged and then merge (or rebase) that in, because #494 also uses wheel-type effects and thus should be included here, but I don't want to make @oczoske's life even harder in that PR...

[codecov]

Codecov Report

Attention: Patch coverage is 90.97222% with 13 lines in your changes missing coverage. Please review.

Project coverage is 77.01%. Comparing base (3cb4fd0) to head (e3b4ca3).

Files with missing lines	Patch %	Lines
scopesim/effects/effects.py	87.75%	6 Missing ⚠️
scopesim/effects/ter_curves.py	92.59%	4 Missing ⚠️
scopesim/effects/spectral_trace_list.py	89.47%	2 Missing ⚠️
scopesim/effects/apertures.py	95.45%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #561      +/-   ##
==========================================
- Coverage   77.01%   77.01%   -0.01%     
==========================================
  Files          66       66              
  Lines        8219     8217       -2     
==========================================
- Hits         6330     6328       -2     
  Misses       1889     1889              

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