feat(samples): Add button to display gallery picker

[github-actions]

Note

The pull request "feat(samples): Add button to display gallery picker" was created by @philprime but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

I used this sample to investigate #6104. I believe it is benefical to keep it around.

#skip-changelog

[linear]

COCOA-1035