add tutorial about working with Resolution HDUs

[sbailey]

e.g. expand on this snippet

from desispec.interpolation import resample_flux
from desispec.resolution import Resolution
R = Resolution(spectra.resolution_data['r'][i])
txflux = R.dot(resample_flux(spectra.wave['r'], twave, tflux))

[weaverba137]

@sbailey, do you know if this ever made it into a notebook?

[weaverba137]

Is this important for EDR? If not, feel free to remove it from the EDR countdown project.

[weaverba137]

@forero, are you aware of any existing notebooks that demonstrate resolution HDUs?

[forero]

@weaverba137 We have this notebook https://github.com/desihub/tutorials/blob/23.4/meetings/Dec2021/SpectroperfectionismExample.ipynb that does a basic demonstration of the concept, but it doesn't quite follow @sbailey's original idea.

[forero]

@sbailey Are you happy with this notebook https://github.com/desihub/tutorials/blob/23.4/meetings/Dec2021/SpectroperfectionismExample.ipynb that mentions resolution HDUs?

[sbailey]

@forero thanks for finding that historical notebook. Yes, that covers the topics I was thinking of for this ticket. The action item now is to make an updated version of that notebook that uses EDR data as input, and put it some place easier to find that buried under a meetings/ subdir. This might be more technical than "getting_started", but oddly we don't seem to have a directory for spectra-oriented tutorials.

[forero]

I haven't been able to address the issue yet. I am removing it from the EDR board for the time being.