Add functionality to work with (qubit) arrays about pyqir HOT 1 CLOSED

Hi @fiona-guerin, PyQIR is primarily designed for hardware targeted QIR. It can parse arbitrary QIR produced with LLVM14 and older, but generation is limited as it focuses on profile compliant code generation rather than unrestricted LLVM IR/BC.

As the profiles advance, we will add more features. Current hardware can't allocate dynamic memory and there currently isn't anything planned for user defined types.

The array type you see is for primitive string arrays of global string constants used for output tagging. This is the only part of the API that can create Arrays and it is rust only. They ArrayType in the Python API is only allowed for parsing the structures from existing modules as there is no other profile compliant way to generate arrays than global constant strings (at which point the i8* array is an implementation detail and we provide helper APIs for reading those arrays as strings).

from pyqir.