Enhance usability

[munrojm]

This PR aims at enhancing usability of the API though:

• Generic search method privatized. Rester search methods all renamed to search.
• query method of MPRester removed and replaced with search in SummaryRester
• Input parameters for summary search are sorted alphabetically
• Standardize units in doc models
• Add information linking summary search parameters to their location in other endpoints
• Representation changes in doc models to handle data that is not requested -- POSTPONED
• Allow ALL single entry query params to take in lists of values
• Strip _id from returned data if no doc model used
• Give deprecated warning with old search methods

[codecov-commenter]

Codecov Report

Merging #506 (f7d9a8d) into main (865f33f) will decrease coverage by 0.56%.
The diff coverage is 87.95%.

@@            Coverage Diff             @@
##             main     #506      +/-   ##
==========================================
- Coverage   92.24%   91.68%   -0.57%     
==========================================
  Files          35       35              
  Lines        1393     1479      +86     
==========================================
+ Hits         1285     1356      +71     
- Misses        108      123      +15     

Impacted Files	Coverage Δ
src/mp_api/routes/doi.py	100.00% <ø> (ø)
src/mp_api/routes/phonon.py	100.00% <ø> (ø)
src/mp_api/routes/similarity.py	100.00% <ø> (ø)
src/mp_api/core/client.py	88.01% <36.84%> (-3.15%)	⬇️
src/mp_api/routes/fermi.py	88.88% <66.66%> (-11.12%)	⬇️
src/mp_api/routes/electronic_structure.py	89.70% <82.14%> (+0.39%)	⬆️
src/mp_api/client.py	91.51% <94.11%> (-0.10%)	⬇️
src/mp_api/routes/oxidation_states.py	95.83% <94.44%> (-4.17%)	⬇️
src/mp_api/routes/bonds.py	96.00% <100.00%> (+0.16%)	⬆️
src/mp_api/routes/charge_density.py	86.56% <100.00%> (ø)
... and 18 more

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