Links between reference notebooks broken when converted to docs

[MarcSkovMadsen]

In a notebook like ChatMessage.ipynb you have a link to another notebook [ChatFeed](ChatFeed.ipynb).

This link works when using the notebook as a notebook. But when the notebooks are converted to documentation this no longer works.

See https://holoviz-dev.github.io/panel/reference/chat/ChatMessage.html where the link becomes #ChatFeed.ipynb when it should have become something like ./ChatFeed.html.

I would suggest we add a script to handle this during the conversion from notebook to markdown.

[MarcSkovMadsen]

These are just some examples of the many broken links between reference notebooks.

/home/jovyan/repos/private/panel/doc/reference/chat/ChatAreaInput.md:23: WARNING: 'myst' cross-reference target not found: 'ChatInterface.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatFeed.md:12: WARNING: 'myst' cross-reference target not found: 'ChatMessage.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatFeed.md:21: WARNING: 'myst' cross-reference target not found: 'ChatInterface.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatFeed.md:93: WARNING: 'myst' cross-reference target not found: 'ChatEntry.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatFeed.md:93: WARNING: 'myst' cross-reference target not found: 'ChatEntry.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatFeed.md:372: WARNING: 'myst' cross-reference target not found: 'ChatStep.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatFeed.md:404: WARNING: 'myst' cross-reference target not found: 'ChatStep.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatFeed.md:671: WARNING: 'myst' cross-reference target not found: 'ChatMessage.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatFeed.md:692: WARNING: 'myst' cross-reference target not found: 'ChatInterface.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatFeed.md:766: WARNING: 'myst' cross-reference target not found: 'ChatInterface.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatInterface.md:18: WARNING: 'myst' cross-reference target not found: 'ChatMessage.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatInterface.md:19: WARNING: 'myst' cross-reference target not found: 'ChatMessage.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatInterface.md:20: WARNING: 'myst' cross-reference target not found: 'ChatMessage.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatInterface.md:22: WARNING: 'myst' cross-reference target not found: 'ChatFeed.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatInterface.md:22: WARNING: 'myst' cross-reference target not found: 'ChatFeed.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatInterface.md:22: WARNING: 'myst' cross-reference target not found: 'ChatFeed.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatInterface.md:324: WARNING: 'myst' cross-reference target not found: 'ChatFeed.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatInterface.md:324: WARNING: 'myst' cross-reference target not found: 'ChatFeed.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatMessage.md:25: WARNING: 'myst' cross-reference target not found: 'ChatFeed.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatMessage.md:27: WARNING: 'myst' cross-reference target not found: 'ChatInterface.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatMessage.md:365: WARNING: 'myst' cross-reference target not found: 'ChatInterface.ipynb' [myst.xref_missing]
/home/jovyan/repos/private/panel/doc/reference/chat/ChatStep.md:198: WARNING: 'myst' cross-reference target not found: 'ChatFeed.ipynb' [myst.xref_missing]