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-homeserver-proxy/tasks/uninstall.yml

@@ -0,0 +1,25 @@
+---
+
+- name: Check existence of Matrix Homeserver Proxy systemd service
+  ansible.builtin.stat:
+    path: "{{ devture_systemd_docker_base_systemd_path }}/{{ matrix_homeserver_proxy_ident }}.service"
+  register: matrix_homeserver_proxy_service_stat
+
+- when: matrix_homeserver_proxy_service_stat.stat.exists | bool
+  block:
+    - name: Ensure Matrix Homeserver Proxy systemd service is stopped
+      ansible.builtin.service:
+        name: "{{ matrix_homeserver_proxy_ident }}"
+        state: stopped
+        enabled: false
+        daemon_reload: true
+
+    - name: Ensure Matrix Homeserver Proxy systemd service doesn't exist
+      ansible.builtin.file:
+        path: "{{ devture_systemd_docker_base_systemd_path }}/{{ matrix_homeserver_proxy_ident }}.service"
+        state: absent
+
+    - name: Ensure Matrix Homeserver Proxy directory is deleted
+      ansible.builtin.file:
+        path: "{{ matrix_homeserver_proxy_base_path }}"
+        state: absent