Add full ONLYOFFICE integration:

- New web-svc-onlyoffice role (Docker, env, CSP, proxy hooks)
- Nextcloud plugin integration with JWT and CSP updates
- Custom Nextcloud image with updated CA certificates
- Networking and port assignments
- Disabled Collabora by default
- Enabled ONLYOFFICE by default
- Link to conversation for reference: https://chatgpt.com/share/691f49ac-54d8-800f-83c3-60cf8c100183

roles/web-svc-onlyoffice/tasks/01_core.yml

@@ -0,0 +1,9 @@
+- name: "Load core functions for '{{ application_id }}'"
+  include_role:
+    name: sys-stk-full-stateless
+  vars:
+    docker_compose_flush_handlers:        true
+    docker_compose_file_creation_enabled: true
+    docker_pull_git_repository:           false
+
+- include_tasks: utils/run_once.yml