Smooth ect

[yemeen]

Adds SECT class for syntactic sugar

Description

wraps ect.calculate().smooth()

Motivation and Context

keeps different ect types separate

How has this been tested?

added tests in tests/test_sect.py

Types of changes

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

Checklist

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