Add cw complex and bug fixes

[lizliz]

Description

Motivation and Context

The main goal was to add cw complex stuff.

How has this been tested?

Added tests to the folder. In the process, found some massive bugs.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• My code follows the code style of this project. (make clean)
• My change requires a change to the documentation.
• I have updated the documentation accordingly. (make html)
• I have incremented the version number in the pyproject.toml file.
• I have added tests to cover my changes.
• All new and existing tests passed. (make tests)