Earlier quoted context omitted.
What’s preventing this from being done in VSCode? Other than it hasn’t yet? I don’t think it ticks every box for you, but have you tried Jupyter Notebooks in VSCode[0]? [0] https://code.visualstudio.com/docs/datascience/jupyter-noteb...
VSCode doesn't support an API to put outputs inline in the text editor. IIRC there have been longstanding feature requests for it but it would probably have a performance hit. The closest thing is having a separate output window on the right side
[0] https://scalameta.org/metals/docs/editors/vscode/#worksheets