Expanded MPcule API

[espottesmith]

The main purpose of this PR is to expand the MPcules API, adding endpoints for all relevant collections (not just "mpcules_summary").

In addition, there are some smaller improvements:

• the MoleculesBuilder is now much faster because MoleculeGraphs do not need to be generated in the data collection stage
• A mapping of SMD solvent parameters to common solvent names has been included (for @orionarcher)
• Small bugs were fixed (like "open_shell" not being properly added to MoleculesSummaryDocs, num_atoms not being added to MoleculeDocs)

Work still needs to be done to make the API more useful and user-friendly. This will require adding new fields to the MPcules data model. For expediency, this is being pushed off to another PR. Also note that I'm still planning on adding some features to pymatgen, particularly for the parsing of additional properties (MOLDEN input, Raman spectra, etc.), construction and visualization of molecular optimization trajectories, etc.

Contributor Checklist

• I have run the tests locally and they passed.
• I have added tests, or extended existing tests, to cover any new features or bugs fixed in this PR

[codecov-commenter]

Codecov Report

Patch coverage: 69.28% and project coverage change: -0.53 ⚠️

Comparison is base (229a1b1) 91.50% compared to head (e79ff70) 90.98%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #674      +/-   ##
==========================================
- Coverage   91.50%   90.98%   -0.53%     
==========================================
  Files         144      147       +3     
  Lines       10658    10898     +240     
==========================================
+ Hits         9753     9915     +162     
- Misses        905      983      +78     

Impacted Files	Coverage Δ
emmet-core/emmet/core/structure.py	100.00% <ø> (ø)
emmet-builders/emmet/builders/molecules/thermo.py	75.00% <15.00%> (-6.33%)	⬇️
...et/api/routes/mpcules/molecules/query_operators.py	80.66% <17.64%> (-6.54%)	⬇️
emmet-core/emmet/core/molecules/thermo.py	87.50% <50.00%> (ø)
...met/api/routes/mpcules/orbitals/query_operators.py	64.06% <64.06%> (ø)
emmet-core/emmet/core/molecules/summary.py	95.45% <90.00%> (-2.03%)	⬇️
.../emmet/api/routes/mpcules/redox/query_operators.py	100.00% <100.00%> (ø)
...emmet/api/routes/mpcules/thermo/query_operators.py	100.00% <100.00%> (ø)
emmet-builders/emmet/builders/molecules/bonds.py	93.63% <100.00%> (ø)
emmet-builders/emmet/builders/molecules/redox.py	90.95% <100.00%> (ø)
... and 7 more

... and 2 files with indirect coverage changes

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[espottesmith]

Hey @munrojm looks like tests are passing, but maybe I'm not hitting enough lines in my tests. Do you want me to bulk up testing before merge?

Also kind of confused how I could drop the number of files being tested by that much. I certainly didn't delete any tests...