Automatically set correct renderer for Plotly charts in VSCode Notebooks

Because https://github.com/microsoft/vscode-notebook-renderers/pull/199 is unmerged, users of Plotly.py using the VSCode notebooks cannot access the latest Plotly.js/Plotly.py features and no discernible error message is provided. This leads to confusion, because users are working with the latest version of Plotly.py and their charts don't work properly.

This has caused issues for adoption of new features like MapLibre and subtitles in charts, and may others. See e.g.:

• https://github.com/plotly/plotly.py/issues/4715
• https://github.com/plotly/plotly.py/issues/4775
• https://github.com/plotly/plotly.py/issues/4701
• https://github.com/plotly/plotly.py/issues/4583
• https://github.com/plotly/plotly.py/issues/4560
• https://github.com/plotly/plotly.py/issues/4475
• https://github.com/plotly/plotly.py/issues/4528
• https://github.com/plotly/plotly.py/issues/4264
• https://github.com/plotly/plotly.py/issues/4173
• https://github.com/plotly/plotly.py/issues/4094

Developers can workaround this by adding to their notebook:

import plotly.io as pio
pio.renderers.default = "notebook_connected"

While this is trivial to change, it's undiscoverable and non-intuitive. If you have the latest version of Plotly.py installed, you should be able to use the latest features in any Python environment!

Regardless of whether https://github.com/microsoft/vscode-notebook-renderers/pull/199 is merged, this dependency means VSCode Notebook users will always lag behind Plotly.py releases as we wait for VSCode to adopt and release their own updates, which means VSCode users would never have day-of updates without a workaround 🙁

Is it possible to detect that we're in a VSCode Notebook environment and automatically set the correct renderer to avoid this dependency on a VSCode update?

No se nombran archivos del repositorio ni pruebas. Empieza leyendo la configuración de renderers expuesta a través de plotly.io, especialmente el punto de entrada pio.renderers.default, e investiga cómo se identifican los entornos de notebook. Se considera terminado cuando los usuarios de VSCode Notebook reciben automáticamente el renderer compatible actual sin tener que añadir la solución alternativa documentada, y la cobertura incluye el comportamiento de detección.