[unitaryhack] Official documentation

[Zshan0]

As mentioned in #16, there is no official documentation present for pyqrack. The documentation was made on the pyqrack.github.io repository and is being added as docstrings in the original source code. To avoid merge conflicts and other python issues, the code present in the files of the website counterpart has no functionality and has only the docstrings attached to the function.

[Zshan0]

@WrathfulSpatula If there are any changes that I must make, please let me know in advance since the PR must be merged in a week or so, thanks :D

[WrathfulSpatula]

Thank you, this looks amazing! I left some significant commentary on this, including a couple of hard requirements for clarification or changes, but I'm hitting "approve" In the interest of unblocking your workflow, because this could basically go in as-is, if it had to.

Maybe my only hard sticking-point is the Pauli enumeration tuples, and I think that's just your formatting tooling pointing to the fact that I introduced a bug there, by putting extraneous commas that were interpreted as tuples. We'll sort it out, though, and this is fantastic overall! Thank you again!