added canvas as option to the viewer

[haoming29]

Public API Changes

The Viewer constructor now accepts canvas as an option in the parameter options.

Description

• Added canvas as the parameter to the Viewer constructor so that the user can pass OffscreenCanvas to ROS 3D for performance improvement
• Added related test to make sure Viewer correctly initialize with the canvas option

This is built upon PR #549 which will be closed when this PR opens.

#546

[haoming29]

Hi @MatthijsBurgh, could you please review this PR at your convenience? Thanks.

[haoming29]

@MatthijsBurgh Appreciate all the suggestions! Made the modifications and please help review it at your convenience. Thanks!

[MatthijsBurgh]

@Techming could you please edit your first commit to exclude the changes in the build folder?

[haoming29]

@MatthijsBurgh Sorry about that. Reverted build files to the previous commit. (Apologies for the typo in the commit message)

[MatthijsBurgh]

@Techming there are 2 test folders. One is just for running manually in your browser. The other one is running in CI too. You didn't add the test there. I did add it there. Now CI fails.

[haoming29]

I’m working on identifying the issue and wrote additional tests to make sure the Viewer itself can pass the CI test. Could you help approve the workflow? Thanks. @MatthijsBurgh

[haoming29]

From the CI error log it seems that the Viewer class fails the CI without canvas passed in as the param. I will confirm locally if the changes of in my code have effects on the result. @MatthijsBurgh