Add HasControlledInstance mixin class for use with types that have controlled instances

[ehennestad]

No description provided.

[github-actions]

Test Results

464 tests  ±0   464 ✅ ±0   58s ⏱️ -11s
  6 suites ±0     0 💤 ±0 
  1 files   ±0     0 ❌ ±0 

Results for commit 24ec6d6. ± Comparison against base commit 26ba40c.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 135 lines in your changes missing coverage. Please review.

Project coverage is 36.39%. Comparing base (26ba40c) to head (24ec6d6).

Files with missing lines	Patch %	Lines
...minds/+internal/@InstanceLibrary/InstanceLibrary.m	0.00%	86 Missing ⚠️
...penminds/+internal/@InstanceLibrary/getSingleton.m	0.00%	18 Missing ⚠️
...nal/+openminds/+internal/listControlledInstances.m	0.00%	13 Missing ⚠️
...inds/+internal/+vocab/getPluralToSingluarTypeMap.m	0.00%	11 Missing ⚠️
...openminds/+internal/+mixin/HasControlledInstance.m	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #38      +/-   ##
==========================================
- Coverage   36.90%   36.39%   -0.52%     
==========================================
  Files         323      326       +3     
  Lines        3127     3171      +44     
==========================================
  Hits         1154     1154              
- Misses       1973     2017      +44     

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