make FigureWidget resizing responsive

Hi there,

As suggested by @nicolaskruchten I am open this issue to address FigureWidget specific resizing challenges.

As of the latest 5.12 release the resizing of a plotly FigureWidget is resolved:

import plotly.graph_objects as go

fig = go.FigureWidget()
fig

• #3689

But the issue remains when the widget is in another widget container.

import plotly.graph_objects as go
import ipywidgets as ipw

fig = go.FigureWidget()
ipw.VBox([fig])

• There is a similar issue with bqplot that was adresssed by @mariobuikhuizen [bqplot/bqplot#1531], maybe this is a good starting point (see @maartenbreddels comment https://github.com/plotly/plotly.py/pull/3930#issuecomment-1377376325)

Also it would really help to make responsive webapps with the ipywidgets ecosystem if the FigureWidget would also resize vertically to the available space inside its container.

No one on the Plotly team is really actively working on the Widget side of things so PRs are very welcome :)
I would gladly contribute but my knowledge in javascript is quasi non-existent^^, so I hope some of you are able to help out here.

Best regards, Alex-

Beginne damit, das im Issue gezeigte FigureWidget innerhalb von ipywidgets.VBox nachzubilden, und lies dann das referenzierte bqplot-Issue sowie den PR-Kommentar zu plotly.py auf relevantes Verhalten bei der Größenanpassung. Als abgeschlossen gilt die Aufgabe, wenn das FigureWidget innerhalb eines anderen Widget-Containers responsiv skaliert wird, einschließlich einer vertikalen Anpassung an den verfügbaren Platz.