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

@@ -69,3 +69,8 @@ htmlcov/
 
 # Crash recovery artifacts
 ai-cli-crash-capture/
+
+# ReScript/OCaml compiler artifacts
+*.cmt
+*.cmti
+*.cmi