docs: add cauer low pass analog filter example

[jvaverka]

[codecov[bot]]

Codecov Report

Merging #240 (1f2e0a5) into main (c85424e) will decrease coverage by 0.03%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #240      +/-   ##
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- Coverage   16.02%   15.99%   -0.03%     
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  Files          48       48              
  Lines        1629     1638       +9     
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+ Hits          261      262       +1     
- Misses       1368     1376       +8     

see 3 files with indirect coverage changes

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[ven-k]

I'm keeping the Units PR open till upcoming breaking release; it would invalidate any model that use these along with unitless parameters. I can add units to this tutorial in that PR.

[jvaverka]

Nice, thanks for this detailed tutorial :)

Would it be useful to add units to the capacitance and inductance parameters? @ven-k has been adding units to components in

• Add units and missing descriptions to components #214 I'm not sure if adding units in this tutorial will work before that PR is merged?

I would be happy to add units after #214 is merged. Originally, I wrote the example to include units but then hit errors and had to remove them.