chore: add min-size token schema validation

[at-susie]

Issue #, if available:

Description of changes:
Adding min-size token schema validation to support proportional scaling of minimum size constraints.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.52%. Comparing base (7f05b56) to head (35aed32).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #160   +/-   ##
=======================================
  Coverage   97.52%   97.52%           
=======================================
  Files          48       48           
  Lines        2621     2622    +1     
  Branches      541      537    -4     
=======================================
+ Hits         2556     2557    +1     
  Misses         65       65           

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