Add support for nullary bitwise ops

[cqc-alec]

Is your feature request related to a problem? Please describe.

The nullary (i.e. constant) bitwise ops ZERO and ONE were added in pytket 1.28.0. Currently they are not handled by pytket_to_phir().

Describe the solution you'd like

Add support for these operations (conditioning on ONE means do the operation, conditioning on ZERO means don't).

Additional context

Example code:

from pytket.circuit import Circuit
from pytket.circuit.logic_exp import BitWiseOp, create_bit_logic_exp
from pytket.phir.api import pytket_to_phir

circ = Circuit(1, 1)
exp = create_bit_logic_exp(BitWiseOp.ONE, [])
circ.H(0, condition=exp)
circ.measure_all()
pytket_to_phir(circ)

This currently gives an Assertion Error.