Add USAD model for anomaly detection in time series

[omimajleta]

What does this PR do?

1. fixing #number_of_issue

Before submitting

• This PR is made to fix a typo or improve the docs (you can dismiss the other checks if this is the case);
• Was this discussed/approved via a GitHub issue? Please add a link to it if that's the case;
• I have commented my code, particularly in hard-to-understand areas;
• I have written the necessary tests and already run them locally;

[github-actions]

Hi there 👋,

We really appreciate that you have taken the time to make your first PR on PyPOTS!

If you are trying to fix a bug, please reference the issue number in the description or give your details about the bug.
If you are implementing a feature request, please check with the maintainers that the feature will be accepted first.

Best,
Wenjie

[WenjieDu]

This PR is not in a good state and is not ready for review.

[sonarqubecloud]

Quality Gate failed

Failed conditions
11.7% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud