fix(rust): Abort on ockam enroll --output json

Add an early exit to the command `ockam enroll` when
used with the `--output json` flag.

Close build-trust#6119

implementations/rust/ockam/ockam_command/src/enroll/command.rs

@@ -25,6 +25,7 @@ use ockam_api::nodes::InMemoryNode;
 use crate::enroll::OidcServiceExt;
 use crate::identity::initialize_identity_if_default;
 use crate::operation::util::check_for_completion;
+use crate::output::OutputFormat;
 use crate::project::util::check_project_readiness;
 use crate::terminal::OckamColor;
 use crate::util::node_rpc;
@@ -91,6 +92,12 @@ async fn run_impl(
     opts: CommandGlobalOpts,
     _cmd: EnrollCommand,
 ) -> miette::Result<()> {
+    if opts.global_args.output_format == OutputFormat::Json {
+        return Err(miette::miette!(
+            "The flag --output json is invalid for this command."
+        ));
+    }
+
     opts.terminal.write_line(&fmt_log!(
         "Enrolling your default Ockam identity with Ockam Orchestrator...\n"
     ))?;