Add URI format for uniprot.core

[bgyori]

This PR adds a URI pattern for uniprot.core (which already exists as a prefix in Bioregistry but so far had no URI defined).
Related to #1113

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.98%. Comparing base (6092b57) to head (ad720a8).
Report is 9 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1114   +/-   ##
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  Coverage   43.98%   43.98%           
=======================================
  Files         123      123           
  Lines        8166     8166           
  Branches     1900     1900           
=======================================
  Hits         3592     3592           
  Misses       4369     4369           
  Partials      205      205           

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