Initial work on matrix-homeserver-proxy role and eliminating matrix-nginx-proxy

This is still very far from usable.

Various bridges and bots are still talking to
`matrix-nginx-proxy` instead of the new `matrix-homeserver-proxy` role.
These services need to be reworked. While reworking them,
various cleanups are being done as well as adding Traefik-labels to
those that need them.

roles/custom/matrix-bridge-hookshot/tasks/main.yml

@@ -18,8 +18,10 @@
 - tags:
     - setup-all
     - setup-hookshot
+    - setup-bridge-hookshot
     - install-all
     - install-hookshot
+    - install-bridge-hookshot
   block:
     - when: matrix_hookshot_enabled | bool
       ansible.builtin.include_tasks: "{{ role_path }}/tasks/validate_config.yml"
@@ -30,6 +32,7 @@
 - tags:
     - setup-all
     - setup-hookshot
+    - setup-bridge-hookshot
   block:
     - when: not matrix_hookshot_enabled | bool
       ansible.builtin.include_tasks: "{{ role_path }}/tasks/setup_uninstall.yml"