Vendor middleware_automation.keycloak collection

Needed for keycloak_authentication_v2, to manage Keycloak
authentication flows (e.g. the CCCHH browser flow) as YAML.
Chosen over community.general's own copy of the module (deprecated in
favor of this collection, and limited to 4 sub-flow levels there vs.
10 here).

ansible_collections/middleware_automation/keycloak/roles/keycloak_quarkus/handlers/main.yml

@@ -0,0 +1,21 @@
+---
+- name: "Invalidate theme cache: {{ keycloak.service_name }}"
+  ansible.builtin.include_tasks: invalidate_theme_cache.yml
+  listen: "invalidate keycloak theme cache"
+# handler should be invoked anytime a [build configuration](https://www.keycloak.org/server/all-config?f=build) changes
+- name: "Rebuild config: {{ keycloak.service_name }}"
+  ansible.builtin.include_tasks: rebuild_config.yml
+  listen: "rebuild keycloak config"
+- name: "Bootstrapped"
+  ansible.builtin.include_tasks: bootstrapped.yml
+  listen: bootstrapped
+- name: "Restart {{ keycloak.service_name }}"
+  ansible.builtin.include_tasks:
+    file: "{{ keycloak_quarkus_restart_strategy if keycloak_quarkus_ha_enabled else 'restart.yml' }}"
+  listen: "restart keycloak"
+- name: "Display deprecation warning"
+  ansible.builtin.fail:
+    msg: "Deprecation warning: you are using the deprecated variable '{{ keycloak_quarkus_deprecated_variable | d('NotSet') }}', check docs on how to upgrade."
+  failed_when: false
+  changed_when: true
+  listen: "print deprecation warning"