Make {panel-convert-python} filter compatible with {python} filter.

[MarcSkovMadsen]

I would like the custom {panel-convert-python} filter to support the same attributes as the {python} filter, i.e.

• echo: whether or not to show the source code above the rendered app
• code-fold whether or not to fold the code
• code-summary etc.

Cannot get started

I tried searching the documentation, doing google search and asked chatGPT. But I cannot find any documentation on how to create a filter like this. And I'm not able to find the implementation of the filter either.

I've asked for help here quarto-dev/quarto-cli#8049