Container registry show image hash

[iplusplus42]

Feature Description

Hello! I think it would be helpful to show the image hashes/digests for docker container images on the respective package page. I tend to reference them for verifying the build/push/pull process. I don't think Gitea currently has this, but if it does, I can't seem to find it. Thank you!

Screenshots

[KN4CK3R]

Added in #21170

[iplusplus42]

Many thanks!