Signal Measurement Demo

[oxinabox]

This is I think a good demo of a key capability.
Making this work should make sure a variety of more complex variations work.

I am not sure if this itself will work at all without a custom frule to get around the fact that we are working with sampled data rather than a smooth function.
So this is here to test that.

However, I am currently running into other issues, it seems we can't actually AD broadcast.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (03e160f) 56.21% compared to head (57cffe4) 56.21%.
Report is 2 commits behind head on main.

Additional details and impacted files

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  Coverage   56.21%   56.21%           
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  Files          28       28           
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  Misses       1246     1246           

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[oxinabox]

Having implemented this downstream in a very different way (using Implict function theorem, rather than on sampled space) this PR is no longer useful to me