Add new Shopware 6 role with OIDC/LDAP plugin integration and Docker-based deployment configuration.

Includes:
- New role: web-app-shopware (Docker, MariaDB, Redis, OpenSearch)
- Updated networks and ports configuration
- Automated install, migration, and admin creation
- Optional IAM integration via OIDC/LDAP plugins

Reference: https://chatgpt.com/share/6907b0d4-ab14-800f-b576-62c0d26c8ad1

roles/web-app-shopware/tasks/01_database.yml

@@ -0,0 +1,10 @@
+---
+- name: Flush handlers to ensure containers are up before rendering .env
+  meta: flush_handlers
+
+- name: Render .env for Shopware
+  template:
+    src:  "templates/env.j2"
+    dest: "{{ docker_compose.directories.instance }}/.env"
+    mode: "0640"
+  notify: docker compose up