Update Gitea role for docker_compose_deploy

- Add MariaDB to dev playbook
- Set Git user in "users:"
- Define Gitea external compose project
- Forward SSH port in forwarding script
- Create user groups with system users
- Install python3-pymysql for Ansible
- Strip old Gitea deployment methods
- Bind MariaDB to docker0 for Docker access

roles/mariadb/handlers/main.yml

@@ -0,0 +1,5 @@
+- name: Restart MariaDB
+  ansible.builtin.service:
+    name: mariadb
+    state: restarted
+  listen: restart_mariadb