Exorcise properties, auto-generate API and build pydata theme website

[dccowan]

This pull request is meant to fix the following issues:

• Exorcising the properties package from the geoana repository
• Create the docstring structure and auto-generate the API section
• Build the website (including API) with pydata theme
• Basic fdem and tdem functions now work for multiple locations and times/frequencies

Some aspects that still need to be considered are:

• Removing commented out legacy code
• Whether we should used frequencies and times as properties because functionality works for multiple frequencies/times
• Filling in some of the docstrings; especially the earthquake stuff

[dccowan]

Broken links. I things these are autogenerated somehow. Could add to linkcheck ignore or remove the thing in conf.py that generates this in the first place?

[dccowan]

Looks like it's a problem with the docs test. I thought we found a way for this test to work for local build with Windows and not fail on the PR tests

[jcapriot]

I don’t think the codacy link is auto-generated. Just do a search in the codebase for codacy.com and you should find it.

[codecov[bot]]

Codecov Report

Merging #31 (f7f0775) into main (49cbf91) will increase coverage by 2.00%. The diff coverage is 80.23%.

@@            Coverage Diff             @@
##             main      #31      +/-   ##
==========================================
+ Coverage   72.84%   74.85%   +2.00%     
==========================================
  Files          21       25       +4     
  Lines        1197     2187     +990     
==========================================
+ Hits          872     1637     +765     
- Misses        325      550     +225     

Impacted Files	Coverage Δ
geoana/earthquake/__init__.py	100.00% <ø> (ø)
geoana/em/fdem/__init__.py	100.00% <ø> (ø)
geoana/em/fdem/simple_functions.py	100.00% <ø> (ø)
geoana/em/tdem/__init__.py	100.00% <ø> (ø)
geoana/em/tdem/simple_functions.py	100.00% <ø> (ø)
geoana/plotting_utils.py	60.74% <60.74%> (ø)
geoana/em/fdem/base.py	79.62% <69.23%> (-3.30%)	:arrow_down:
geoana/earthquake/oksar.py	56.37% <70.69%> (+20.87%)	:arrow_up:
geoana/em/fdem/layered.py	77.12% <73.38%> (-11.77%)	:arrow_down:
geoana/em/tdem/base.py	77.14% <77.77%> (+2.14%)	:arrow_up:
... and 18 more

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