fix: tsconfig - skip checking dependency d.ts files

[filmaj]

also adds schema reference to top of tsconfig

This should unblock #2224

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.59%. Comparing base (abbe82c) to head (f5bcddc).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2226   +/-   ##
=======================================
  Coverage   81.59%   81.59%           
=======================================
  Files          19       19           
  Lines        1646     1646           
  Branches      464      464           
=======================================
  Hits         1343     1343           
  Misses        194      194           
  Partials      109      109           

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