feat: merge role and playbook into single repo

Add playbook.yaml and roles/requirements.yml from play-pangolin.
The role now includes docker via include_role in the playbook,
matching the ans-jellyfin pattern.

playbook.yaml

@@ -0,0 +1,26 @@
+---
+
+# execute this role
+- name: "install and configure Pangolin"
+  hosts: "all"
+  become: true
+  tasks:
+
+    # due to semaphore bug we need to do this ourselves
+    - name: "force-update requirements"
+      ansible.builtin.command:
+        cmd: "ansible-galaxy install -f -r roles/requirements.yml"
+      become: false
+      delegate_to: "localhost"
+      changed_when: false
+      failed_when: false
+
+    # execute the role
+    - name: "execute role: docker"
+      ansible.builtin.include_role:
+        name: "docker"
+
+    # execute the role
+    - name: "execute role: pangolin"
+      ansible.builtin.include_role:
+        name: "pangolin"