Initial vaultwarden role

docker compose based vaultwarden, bound to 127.0.0.1, sign ups off, admin panel only with an argon2 token, SMTP via mailcow.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

handlers/main.yml

@@ -0,0 +1,8 @@
+---
+- name: restart vaultwarden
+  community.docker.docker_compose_v2:
+    project_src: "{{ vaultwarden_inst }}"
+    state: present
+    pull: missing
+    recreate: always
+    remove_orphans: yes