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/actions.go

@@ -243,7 +243,7 @@ $ tea workflow run nightly --follow`,
 			if !follow {
 				a.nextStep(cmd, "Watch it: tea run watch %d%s", result.ID, a.suggestedRepo(t))
 			}
-			if err := a.printURL(cmd, result.URL); err != nil || !follow {
+			if err := a.created(cmd, result, result.URL); err != nil || !follow {
 				return err
 			}
 			ctx, cancel := context.WithTimeout(cmd.Context(), timeout)
@@ -474,10 +474,7 @@ $ tea workflow %s Nightly`, verb, verb),
 				}
 				a.done(cmd, "%s %s", done, workflow.Label())
 			}
-			if a.options.json != "" {
-				return a.writeJSON(cmd, workflow)
-			}
-			return nil
+			return a.jsonResult(cmd, workflow)
 		},
 	}
 }