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-bot-buscarron/templates/env.j2

@@ -0,0 +1,33 @@
+BUSCARRON_LOGIN={{ matrix_bot_buscarron_login }}
+BUSCARRON_PASSWORD={{ matrix_bot_buscarron_password }}
+BUSCARRON_HOMESERVER={{ matrix_bot_buscarron_homeserver }}
+BUSCARRON_DB_DSN={{ matrix_bot_buscarron_database_connection_string }}
+BUSCARRON_DB_DIALECT={{ matrix_bot_buscarron_database_dialect }}
+BUSCARRON_SPAMLIST={{ matrix_bot_buscarron_spamlist|join(" ") }}
+BUSCARRON_SPAM_HOSTS={{ matrix_bot_buscarron_spam_hosts|join(" ") }}
+BUSCARRON_SPAM_EMAILS={{ matrix_bot_buscarron_spam_emails|join(" ") }}
+BUSCARRON_SPAM_LOCALPARTS={{ matrix_bot_buscarron_spam_localparts|join(" ") }}
+BUSCARRON_SENTRY={{ matrix_bot_buscarron_sentry }}
+BUSCARRON_LOGLEVEL={{ matrix_bot_buscarron_loglevel }}
+BUSCARRON_BAN_SIZE={{ matrix_bot_buscarron_ban_size }}
+BUSCARRON_BAN_LIST={{ matrix_bot_buscarron_ban_list|default('')|join(' ') }}
+BUSCARRON_PM_TOKEN={{ matrix_bot_buscarron_pm_token }}
+BUSCARRON_PM_FROM={{ matrix_bot_buscarron_pm_from }}
+BUSCARRON_PM_REPLYTO={{ matrix_bot_buscarron_pm_replyto }}
+BUSCARRON_SMTP_FROM={{ matrix_bot_buscarron_smtp_from }}
+BUSCARRON_SMTP_VALIDATION={{ matrix_bot_buscarron_smtp_validation }}
+BUSCARRON_NOENCRYPTION={{ matrix_bot_buscarron_noencryption }}
+{% set forms = [] %}
+{% for form in matrix_bot_buscarron_forms -%}{{- forms.append(form.name) -}}
+BUSCARRON_{{ form.name|upper }}_ROOM={{ form.room|default('') }}
+BUSCARRON_{{ form.name|upper }}_REDIRECT={{ form.redirect|default('') }}
+BUSCARRON_{{ form.name|upper }}_HASDOMAIN={{ form.hasdomain|default('') }}
+BUSCARRON_{{ form.name|upper }}_HASEMAIL={{ form.hasemail|default('') }}
+BUSCARRON_{{ form.name|upper }}_RATELIMIT={{ form.ratelimit|default('') }}
+BUSCARRON_{{ form.name|upper }}_EXTENSIONS={{ form.extensions|default('')|join(' ') }}
+BUSCARRON_{{ form.name|upper }}_CONFIRMATION_SUBJECT={{ form.confirmation_subject|default('') }}
+BUSCARRON_{{ form.name|upper }}_CONFIRMATION_BODY={{ form.confirmation_body|default('') }}
+{% endfor %}
+BUSCARRON_LIST={{ forms|join(" ") }}
+
+{{ matrix_bot_buscarron_environment_variables_extension }}