Add documentation comment to getPixelData function

[Adityacode-hub]

Added documentation comment explaining the current color detection functionality in SesnsorsBlocks.js

This comment clarifies that getPixelData() currently only works with turtle-drawn content on overlayCanvas. This is part of my preparation for the GSoC "Color sensor for Music Blocks" project, where I plan to extend color detection to work with uploaded images and webcam feed.

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[github-actions]

❌ Some Jest tests failed. Please check the logs and fix the issues before merging.

Failed Tests:

SensorsBlocks.test.js

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[Adityacode-hub]

All Jest tests are passing now ✅.
This PR is ready for review and merge.
Thanks!

[Adityacode-hub]

Hi @omsuneri,
I have created this PR as per the contributing guidelines. All Jest tests have passed successfully.
Kindly review when you get a chance. Thank you!

[Adityacode-hub]

“Hi! Thanks for reviewing. Could you please share the reason it was closed or how I can improve it? I’d love to make the necessary updates.”

[walterbender]

Sorry for taking so long to review.
There seem to be a few indentation issues.

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[Adityacode-hub]

@walterbender I've split this PR into smaller, focused PRs as you requested.
Creating separate PRs now. Closing this one.

[Adityacode-hub]

@walterbender I've split this large PR into three smaller, focused PRs as you requested:

• PR Add Jest test infrastructure for SensorsBlocks #4803: Add Jest test infrastructure for SensorsBlocks
• PR Add getPixelDataFromMedia function for image color detection #4804: Add getPixelDataFromMedia function for image color detection
• PR Fix duplicate methods and improve SensorsBlocks implementation #4805: Fix duplicate methods and improve SensorsBlocks implementation

Each PR now contains related changes that are easier to review. Closing this PR in favor of the new ones. Thank you for the feedback!