Force Breathe extension for Sphinx to use the pyansys classes

[RobPasMue]

Description of the feature

I am not sure if this is the place to post this issue or not. I'll be pinging @jorgepiloto @Revathyvenugopal162 @akaszynski for discussion.

If you go to the following repository which uses the pyansys-sphinx-theme (https://github.com/ansys/api-eigen-example) you will see that in its docs, whatever has been rendered with the breathe extension (i.e. C++ code documentation compiled with Doxygen and reinterpreted with breathe) has a different look&feel in comparison to the Python code docs.

A simple example may be seen by comparing these two sections:

• Normal case scenario: https://apieigen.docs.pyansys.com/api/python-grpc/server.html
• Breathe extension affected site: https://apieigen.docs.pyansys.com/api/cpp-rest/server.html

The goal is to have breathe use the same predefined classes of the pyansys-sphinx-theme so that the output has a similar look. This must probably be done via configuration of the breathe extension. Please, find the docs to the extension in the following site: https://breathe.readthedocs.io/en/latest/

Steps for implementing the feature

Not known yet :) but it should be possible.

Useful links and references

No response