[FEATURE] Unroll ctrl @ qubit registers

### Feature Description

Add support for unrolling the control qubit register when n>1. Example:

Original
```
OPENQASM 3.0;
include "stdgates.inc";
qubit[2] a;
qubit b;

ctrl (2) @ x a, b[0];
```
Unrolled
```
OPENQASM 3.0;
include "stdgates.inc";
qubit[2] a;
qubit[1] b;
ccx a[0], a[1], b[0];
```

### Implementation (Optional)

Modify the visitor `_visit_generic_gate_operation` and related methods