feat(pretix): add ansible role and playbook

roles/pretix/tasks/configure.yml

@@ -0,0 +1,9 @@
+---
+- name: Ensure configuration file is written
+  ansible.builtin.copy:
+    path: "{{ pretix_config_file }}"
+    content: "{{ pretix_config_file_content }}"
+    owner: "{{ pretix_config_file_owner }}"
+    group: "{{ pretix_config_file_group }}"
+    mode: "{{ pretix_config_file_mode }}"
+  when: ansible_state == 'present'