Move package settings to package instead of being tied to version (#37026)

Unties settings page from package version and adds button to delete the
package version
Settings page now allows for deletion of entire package and it's
versions as opposed to a single version

Adds an API endpoint to delete the entire package with all versions from
registry

fixes: https://github.com/go-gitea/gitea/issues/36904

Co-Authored-By: gemini-3-flash

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Giteabot <teabot@gitea.io>

services/packages/cleanup/cleanup.go

@@ -184,6 +184,7 @@ func CleanupExpiredData(ctx context.Context, olderThan time.Duration) error {
 			}
 		}
 
+		// HINT: PACKAGE-DEFER-STORAGE-DELETE: Handle blob deletion for package storage
 		pbs, err = packages_model.FindExpiredUnreferencedBlobs(ctx, olderThan)
 		if err != nil {
 			return err