feat(cli): add the boot-interface command family -- show, candidates, set

crates/admin-cli/cli_domains.yaml

@@ -20,6 +20,7 @@ hardware:
   - dpf
   - dpa
   - bmc-machine
+  - boot-interface
   - boot-override
   - credential
   - power-shelf

crates/admin-cli/src/boot_interface/candidates/args.rs

@@ -0,0 +1,36 @@
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use carbide_uuid::machine::MachineId;
+use clap::Parser;
+
+#[derive(Parser, Debug)]
+#[command(after_long_help = "\
+EXAMPLES:
+
+List boot-interface candidates for a machine and the picks among them:
+    $ nico-admin-cli boot-interface candidates 12345678-1234-5678-90ab-cdef01234567
+
+As JSON (the global --format flag):
+    $ nico-admin-cli --format json boot-interface candidates 12345678-1234-5678-90ab-cdef01234567
+
+Tip: hand a candidate to 'boot-interface set' by its MAC or Interface UUID column.
+")]
+pub struct Args {
+    #[clap(help = "The machine ID whose boot-interface candidates to list")]
+    pub machine: MachineId,
+}