WIP: Add itkwidgets examples to jupyter notebook

[BetsyMcPhail]

Relates #12645.

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This change is 

[EricCousineau-TRI]

Reviewable status: 3 unresolved discussions, needs platform reviewer assigned, needs at least two assigned reviewers, labeled "do not merge" (waiting on @BetsyMcPhail)

a discussion (no related file):
Thanks for packaging this!

That being said, is it possible to also show examples of doing "toy" animations with these different options?
e.g. for meshes / points, can they be animated to rotate and "orbit" around a 3d point?

I would like to know what these look like if we were to do an animation, as indicated here:
https://nbviewer.jupyter.org/github/RobotLocomotion/drake/blob/nightly-release/tutorials/pyplot_animation_multibody_plant.ipynb#Run-with-Playback

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tutorials/3dvisualization_tests.ipynb, line 91 at r1 (raw file):

   "outputs": [],
   "source": [
    "view(geometries=bunny)"

nit (super minor) Is it possible to hide the widgets when first displaying?

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tutorials/3dvisualization_tests.ipynb, line 316 at r1 (raw file):
For some reason, this isn't rendering as a 3d widget for me; it's just a matplotlib-looking static plot:

Is there a package missing, or some config bit that needs to be flipped?

FTR, the link you provided here is able to render as a 3D widget.

[EricCousineau-TRI]

I am going to point some other people here to try these out; FTR, on my machine, I used a modified version of these instructions:
https://github.com/RobotLocomotion/drake/tree/653c35dfc75df59dce8a84ab25eef5370f6c274e/.binder

# Git stuff
git fetch upstream master
git fetch upstream pull/13182/head
git checkout -B feature-itkwidgets FETCH_HEAD
git rebase upstream/master

# Docker stuff
docker build -f .binder/Dockerfile -t binder .
docker run --rm -it --name mybinder -p 8888:8888 binder

[jamiesnape]

@drake-jenkins-bot linux-focal-gcc-bazel-experimental-release please

[EricCousineau-TRI]

Given that Russ has a solution direction with meshcat in #12645, I'll close this for now. Thanks!