test: add verification for QuditCircuit dim > 36 limit

Added a test case in `tests/test_quditcircuit.py` to verify that `QuditCircuit`
raises `NotImplementedError` when initialized with a dimension greater than 36.
This ensures the string-encoded IO limitation is properly enforced and tested.

Co-authored-by: refraction-ray <35157286+refraction-ray@users.noreply.github.com>

Author: google-labs-jules[bot]

tests/test_quditcircuit.py

@@ -347,6 +347,8 @@ def test_quditcircuit_set_dim_validation():
         tc.QuditCircuit(1, 2)
     with pytest.raises(ValueError):
         tc.QuditCircuit(1, 2.5)  # type: ignore[arg-type]
+    with pytest.raises(NotImplementedError):
+        tc.QuditCircuit(1, 37)
 
 
 @pytest.mark.parametrize("backend", [lf("jaxb"), lf("tfb"), lf("torchb")])