Move roles/matrix* to roles/custom/matrix*

This paves the way for installing other roles into `roles/galaxy` using `ansible-galaxy`,
similar to how it's done in:

- https://github.com/spantaleev/gitea-docker-ansible-deploy
- https://github.com/spantaleev/nextcloud-docker-ansible-deploy

In the near future, we'll be removing a lot of the shared role code from here
and using upstream roles for it. Some of the core `matrix-*` roles have
already been extracted out into other reusable roles:

- https://github.com/devture/com.devture.ansible.role.postgres
- https://github.com/devture/com.devture.ansible.role.systemd_docker_base
- https://github.com/devture/com.devture.ansible.role.timesync
- https://github.com/devture/com.devture.ansible.role.vars_preserver
- https://github.com/devture/com.devture.ansible.role.playbook_runtime_messages
- https://github.com/devture/com.devture.ansible.role.playbook_help

We just need to migrate to those.

roles/custom/matrix-jitsi/tasks/util/setup_jitsi_auth.yml

@@ -0,0 +1,41 @@
+---
+#
+# Start Necessary Services
+#
+
+- name: Ensure matrix-jitsi-prosody container is running
+  ansible.builtin.systemd:
+    state: started
+    name: matrix-jitsi-prosody
+  register: matrix_jitsi_prosody_start_result
+
+
+#
+# Tasks related to configuring Jitsi internal authentication
+#
+
+- name: Ensure Jitsi internal authentication users are configured
+  ansible.builtin.shell: "{{ matrix_host_command_docker }} exec matrix-jitsi-prosody prosodyctl --config /config/prosody.cfg.lua register {{ item.username | quote }} meet.jitsi {{ item.password | quote }}"
+  with_items: "{{ matrix_jitsi_prosody_auth_internal_accounts }}"
+  when:
+    - matrix_jitsi_auth_type == "internal"
+    - matrix_jitsi_prosody_auth_internal_accounts|length > 0
+  register: matrix_jitsi_user_configuration_result
+  changed_when: matrix_jitsi_user_configuration_result.rc == 0
+
+#
+# Tasks related to configuring other Jitsi authentication mechanisms
+#
+
+#
+# Tasks related to cleaning after Jitsi authentication configuration
+#
+
+#
+# Stop Necessary Services
+#
+- name: Ensure matrix-jitsi-prosody container is stopped if necessary
+  ansible.builtin.systemd:
+    state: stopped
+    name: matrix-jitsi-prosody
+  when: matrix_jitsi_prosody_start_result.changed | bool