Enabling configurable notes and raw texts at the begin of specified commands

### 📝 Description of the feature

The same way a ``warning`` can be added from the ``config.yaml`` file, ``.. note::`` and raw text could be accepted at the top of a method docstring.

Mentioned for the first time in https://github.com/ansys/pymapdl/pull/3385#discussion_r1920277225

### 💡 Steps for implementing the feature

_No response_

### 🔗 Useful links and references

_No response_

The issue names config.yaml and method docstrings but provides no files or tests. Start by tracing how warning entries from config.yaml are handled during XML-to-Python conversion, then determine where leading note directives and raw text should be accepted. Done means both forms can be configured at the beginning of specified method docstrings.

Written by the indexing model from the issue text.