feat(hardware): auto-detect audio, bluetooth, camera with declarative override

tests/hardware/test_merge.yml

@@ -0,0 +1,15 @@
+---
+# Run: ansible-playbook tests/hardware/test_merge.yml
+- name: Hardware merge-layer fixture tests
+  hosts: localhost
+  gather_facts: false
+  connection: local
+  vars_files:
+    - merge_fixtures.yml
+  tasks:
+    - name: Run each merge fixture
+      ansible.builtin.include_tasks: _assert_merge.yml
+      loop: "{{ merge_fixtures }}"
+      loop_control:
+        loop_var: mf
+        label: "{{ mf.name }}"