Adding CI Ansible run.

.github/test/variables.yaml

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+---
+group_data:
+  ansible:
+    sudo:
+      type: nopasswd
+      commands: all
+
+user_data:
+  deadswitch:
+    ssh_key: "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINBpU3ZoAwSXwSZoAae4ca1BPVwcNaxIYXkYwzCbX5+4"
+    full_name: "DeadSwitch"
+    password: "*"
+    groups:
+      - ansible
+    sudo:
+      type: nopasswd
+      commands: all
+
+firewall_allowed_ports:
+  - { port: "{{ sshd_port | default('22') }}", proto: tcp }
+  - { port: "53", proto: udp }
+  - { port: "443", proto: tcp }

.github/workflows/test.yaml

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+---
+name: Ansible Test Run
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  ansible-run-test:
+    runs-on: ubuntu-latest
+    container:
+      image: debian:13
+
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v4
+      - name: Install the dependencies
+        run: apt-get update && apt-get install -y ansible
+      - name: Run Ansible
+        run: ansible-playbook playbooks/play-operation-zero.yml -e @.github/test/variables.yaml -i localhost, -c local