### Feature Description - Nested function calls in the visitor are not handled presently. This will require some change in the [variable processing of qasm3 subroutines](https://github.com/qBraid/pyqasm/blob/0036122bbc906f732f239dfe9aa54354dd7be96a/pyqasm/visitor.py#L1287). - The [test for nested subroutines](https://github.com/qBraid/pyqasm/blob/0036122bbc906f732f239dfe9aa54354dd7be96a/tests/subroutines/test_subroutines.py#L266) is already marked in the test suite and should pass once the functionality is implemented. ### Implementation (Optional) _No response_
Feature Description
Implementation (Optional)
No response