Physics Constraints debug viewer

[CedricGuillemet]

Test / Documentation PG https://playground.babylonjs.com/#RMF5CJ#35

[bjsplat]

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.

[bjsplat]

Snapshot stored with reference name:
refs/pull/15960/merge

Test environment:
https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/15960/merge/index.html

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

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/15960/merge/index.html#WGZLGJ#4600

Links to test babylon tools with this snapshot:

https://playground.babylonjs.com/?snapshot=refs/pull/15960/merge
https://sandbox.babylonjs.com/?snapshot=refs/pull/15960/merge
https://gui.babylonjs.com/?snapshot=refs/pull/15960/merge
https://nme.babylonjs.com/?snapshot=refs/pull/15960/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/15960/merge#BCU1XR#0

[bjsplat]

Visualization tests for WebGPU (Experimental)

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/15960/merge/testResults/webgpuplaywright/index.html

[bjsplat]

WebGL2 visualization test reporter:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/15960/merge/testResults/webgl2playwright/index.html

[github-actions]

This pull request has been marked as stale because it has been inactive for more than 14 days. Please update to "unstale".

[sebavan]

Should we keep it or do we expect it to stay stale
Please close it if no plan to update soon

[CedricGuillemet]

Expecting it ready for review in the coming days.