chore: untrack ReScript compiler artifacts (.cmt/.cmti/.cmi)

These are generated by the ReScript/OCaml compiler and should not be
version-controlled. Added to .gitignore and removed from tracking.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

.gitignore

@@ -92,3 +92,7 @@ secrets/
 # Test/Coverage
 /coverage/
 htmlcov/
+
+# ReScript/OCaml compiler artifacts
+*.cmti
+*.cmi