Add a pip installation option for end users

[Aaron-Rowlands]

Implementation Sketch: Expand the conda release workflow to build and publish a package on PyPI.

[IvanaGyro]

I worked on #711, but now I am too busy. I have also requested an PyPI organization for Cytnx. The org is in process.

[IvanaGyro]

I think we should also need to move the package from the personal channel to conda-forge. This requires that the package is already on PyPI.