chore: OME-Zarr Example app improvements

[lanesawyer]

What

TODO

How

TODO

Screenshots

PR Checklist

• Is your PR title following our conventional commit naming recommendations?
• Have you filled in the PR Description Template?
• Is your branch up to date with the latest in main?
• Do the CI checks pass successfully?
• Have you smoke tested the example applications?
• Did you check that the changes meet accessibility standards?
• Have you tested the application on these browsers?
  • Chrome (Fully supported)
  • Firefox (Major bug fixes supported)
  • Safari (Major bug fixes supported)

[lanesawyer]

This was for the pre-Starlight version, might be able to massage this into shape but we'll just enhance things with color changing at a future date when it's a feature we have in general on OME-Zarr