feat(send): add role for self-hosted Send file-share service

Deploys timvisee/send with a Redis backend behind Traefik. Supports
local-disk or S3 storage (e.g. via the garage role). Uses the shared
`*_domains` list convention so the router can accept internal *.int.*
names alongside the canonical BASE_URL host.

roles/send/tasks/main.yml

@@ -0,0 +1,28 @@
+#SPDX-License-Identifier: MIT-0
+---
+# tasks file for send
+
+- name: Create docker compose directory
+  file:
+    path: "{{ send_docker_compose_dir }}"
+    state: directory
+    mode: '0755'
+
+- name: Create local upload directory
+  file:
+    path: "{{ send_docker_volume_dir }}/uploads"
+    state: directory
+    mode: '0755'
+  when: send_storage_backend == "local"
+
+- name: Create docker-compose file for send
+  template:
+    src: docker-compose.yml.j2
+    dest: "{{ send_docker_compose_dir }}/docker-compose.yml"
+    mode: '0644'
+  notify: restart send
+
+- name: Start send container
+  community.docker.docker_compose_v2:
+    project_src: "{{ send_docker_compose_dir }}"
+    state: present