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-bridge-heisenbridge/defaults/main.yml

@@ -0,0 +1,48 @@
+---
+# heisenbridge is a bouncer-style Matrix IRC bridge
+# Project source code URL: https://github.com/hifi/heisenbridge
+
+matrix_heisenbridge_enabled: true
+
+matrix_heisenbridge_version: 1.14.0
+matrix_heisenbridge_docker_image: "{{ matrix_container_global_registry_prefix }}hif1/heisenbridge:{{ matrix_heisenbridge_version }}"
+matrix_heisenbridge_docker_image_force_pull: "{{ matrix_heisenbridge_docker_image.endswith(':latest') }}"
+
+# Set this to your Matrix ID if you want to enforce the owner, otherwise first _local_ user becomes one
+matrix_heisenbridge_owner: ""
+
+# Enabling identd will bind to host port 113/TCP
+matrix_heisenbridge_identd_enabled: false
+
+matrix_heisenbridge_base_path: "{{ matrix_base_data_path }}/heisenbridge"
+
+# A list of extra arguments to pass to the container
+matrix_heisenbridge_container_extra_arguments: []
+
+# List of systemd services that service depends on.
+matrix_heisenbridge_systemd_required_services_list: ['docker.service']
+
+# List of systemd services that service wants
+matrix_heisenbridge_systemd_wanted_services_list: []
+
+matrix_heisenbridge_homeserver_url: "{{ matrix_homeserver_container_url }}"
+
+matrix_heisenbridge_appservice_token: ''
+matrix_heisenbridge_homeserver_token: ''
+
+# Default registration file
+matrix_heisenbridge_registration_yaml:
+  id: heisenbridge
+  url: http://matrix-heisenbridge:9898
+  as_token: "{{ matrix_heisenbridge_appservice_token }}"
+  hs_token: "{{ matrix_heisenbridge_homeserver_token }}"
+  rate_limited: false
+  sender_localpart: heisenbridge
+  namespaces:
+    users:
+      - regex: '@hbirc_.*'
+        exclusive: true
+    aliases: []
+    rooms: []
+
+matrix_heisenbridge_registration: "{{ matrix_heisenbridge_registration_yaml | from_yaml }}"