fix: Add Tooltip for Remove from Collection List Button

[localhost-legend]

Summary

  - **client/components/SketchList.js**: Added a tooltip to the 'X' button in the Collection view

  What changed
  Add a tooltip to the 'X' button in the Collection view by identifying the responsible component and implementing a hover and keyboard focus event handler. Examine existing tooltip implementations in the p5.js editor for guidance.

   Testing
  I tested this locally and the changes work as expected. Happy to make any adjustments if needed!

  Closes #3882