This adds support for the Align gate to the qasm parser and should close #1478. However, this implementation is not compatible with qiskit which begs for defining the delay gate (their equivalent to our align) as a special operation:

OPENQASM 2.0;
include "qelib1.inc";
opaque delay(param0) q0;
qreg q[1];
delay(1.0) q[0];

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.