A new Class, creating bridge-free Josephson Junctions

[Judi-PN]

A class creating a bridge-free JJ.

What are the issues this pull addresses (issue numbers / links)?

Creating a bridge-free junction

Did you add tests to cover your changes (yes/no)?

Yes.

Did you update the documentation accordingly (yes/no)?

documentation added

Did you read the CONTRIBUTING document (yes/no)?

yes

Summary

This class is to design a brdige-free josephson junction. The reference has been mentioned in the description of the class.
All features can be adjusted as needed.

Details and comments

[CLAassistant]

All committers have signed the CLA.