Add support for global secrets to kadet.docker-swarm

roles/kadet.docker-swarm/defaults/main.yml

@@ -1,2 +1,3 @@
 ---
 swarm_global_networks: []
+swarm_global_secrets: []

roles/kadet.docker-swarm/tasks/main.yml

@@ -11,3 +11,9 @@
     driver: "{{ item.driver|default('overlay') }}"
     scope: swarm
   loop: "{{ swarm_global_networks }}"
+
+- name: Init global secrets for swarm
+  community.docker.docker_secret:
+    name: "{{ item.name }}"
+    data: "{{ item.data|string }}"
+  loop: "{{ swarm_global_secrets }}"