API Improvements

[cthoyt]

This PR has multiple useful additions including:

1. Auto-merge of ontologies
2. Loading local OBO Graph JSON
3. Performance improvements when loading bioregistry converter (related to Performance: Loading from robot modules taking ~24 seconds #7)
4. Better normalization of properties and access to them
5. Simpler interface for getting version after parsing

Blocked by

• Add top-level converter bioregistry#652

[codecov-commenter]

Codecov Report

Base: 38.04% // Head: 35.22% // Decreases project coverage by -2.81% ⚠️

Coverage data is based on head (57bf12b) compared to base (ee28000).
Patch coverage: 25.80% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #8      +/-   ##
==========================================
- Coverage   38.04%   35.22%   -2.82%     
==========================================
  Files          10       10              
  Lines         665      687      +22     
  Branches      127      132       +5     
==========================================
- Hits          253      242      -11     
- Misses        400      432      +32     
- Partials       12       13       +1     

Impacted Files	Coverage Δ
src/bioontologies/robot.py	41.21% <21.05%> (-3.40%)	⬇️
src/bioontologies/obograph.py	44.13% <27.27%> (-0.79%)	⬇️
src/bioontologies/__init__.py	100.00% <100.00%> (ø)
src/bioontologies/upgrade/__init__.py	0.00% <0.00%> (-40.63%)	⬇️

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