FEAT: adding missing Maxwell example (RMxprt)

[anur7]

Pull Request Template

Description

This example is present in pyaedt repo but not in this repository. See: https://github.com/ansys/pyaedt/blob/main/examples/03-Maxwell/RMxprt.py

Checklist

Please complete the following checklist before submitting your pull request:

• I have followed the example template and guide lines to add/update an example.
• I have tested the example locally and verified that it is working with the latest version of AEDT.
• I have verified that these changes to the best of my knowledge do not introduce any security vulnerabilities.

[gmalinve]

LGTM. I left minor comments that you can directly commit from Github @anur7

[Samuelopez-ansys]

It is missed the non graphical and num cores constant. Please check other examples and apply it

[Samuelopez-ansys]

You missed NUM_CORES in the analyze part

[gmalinve]

LGTM.