refactor(output): share the JSON, created-resource and batch tails

Mutations end with a.jsonResult or a.created instead of hand-rolled
--json branches, the two identical jsonResult/writeMutationJSON helpers
become one, and writeBatchJSON checks --json itself so batch commands
share one tail.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/release_assets.go

@@ -352,7 +352,7 @@ func (a *application) assetEditCommand() *cobra.Command {
 				return err
 			}
 			a.done(cmd, "Renamed asset %s to %s in release %s", asset.Name, item.Name, release.Tag)
-			return a.writeMutationJSON(cmd, item)
+			return a.jsonResult(cmd, item)
 		},
 	}
 	command.Flags().StringVar(&name, "name", "", "New asset name")