Association kg

[rjawesome]

biothings/biothings_explorer#599
Association can be specified in the yaml through association_id property, ie.

...
outputs:
      - id: NCBIGene
        semantic: Gene
biolink_association_type: TestToTest
...

[rjawesome]

1. biolink: prefix is added to associations when meta_knowledge_graph endpoint is called
2. name in x-bte yaml changed to biolink_association_type

[codecov]

Codecov Report

Merging #75 (867987a) into main (b426011) will increase coverage by 0.92%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main      #75      +/-   ##
==========================================
+ Coverage   86.18%   87.10%   +0.92%     
==========================================
  Files          30       30              
  Lines         731      737       +6     
  Branches      148      154       +6     
==========================================
+ Hits          630      642      +12     
+ Misses        100       94       -6     
  Partials        1        1              

Impacted Files	Coverage Δ
..._builder/async_operations_builder_with_reasoner.ts	39.70% <0.00%> (-1.84%)	⬇️
src/parser/endpoint.ts	98.52% <ø> (+1.47%)	⬆️
...s_builder/sync_operations_builder_with_reasoner.ts	84.21% <100.00%> (+0.64%)	⬆️

... and 3 files with indirect coverage changes

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[colleenXu]

Noting that this may not be ready to put on dev; we may have to wait until I've finished some curation work (adding the biolink_association_type to some x-bte operations) and tested these PRs...

[tokebe]

Note: Requires merge conflict fixes.