Vsm state view wip

[carolhmj]

This adds basic nodes view and a very very simple state implementation that only responds to click events on a basic scene.

[azure-pipelines]

Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s).
To prevent this PR from going to the changelog marked it with the "skip changelog" label.

[azure-pipelines]

Snapshot stored with reference name:
refs/pull/13124/merge

Test environment:
https://babylonsnapshots.z22.web.core.windows.net/refs/pull/13124/merge/index.html

To test a playground add it to the URL, for example:

https://babylonsnapshots.z22.web.core.windows.net/refs/pull/13124/merge/index.html#WGZLGJ#4600

Links to test babylon tools with this snapshot:

https://playground.babylonjs.com/?snapshot=refs/pull/13124/merge
https://sandbox.babylonjs.com/?snapshot=refs/pull/13124/merge
https://gui.babylonjs.com/?snapshot=refs/pull/13124/merge
https://nme.babylonjs.com/?snapshot=refs/pull/13124/merge

To test the snapshot in the playground with a playground ID add it after the snapshot query string:

https://playground.babylonjs.com/?snapshot=refs/pull/13124/merge#BCU1XR#0

[RaananW]

Sorry for the delay in reviewing :-)

I will pull this branch later and see it locally

[RaananW]

Lookg great! I think it will be important to say that this is not yet usable (since this is public code!). and that it is a WIP.
Maybe even change the version in package.json to 0.0.1 and add description just to be sure that no one pulls this and tries using it :-)

[azure-pipelines]

Reviewer - this PR has made changes to one or more package.json files.