feat: use galaxy module to configure sshd (#78)

This is part of the work being done in #27. 

This diff adds support for using the ansible galaxy module
((ansible-sshd){https://github.com/willshersystems/ansible-sshd}) to
configure sshd on the ansible-controller and other hosts (all hosts
using the `ssh_users` role)

---------

Co-authored-by: decfox <decfox@decfoxs-MBP.lan>

ansible/roles/ssh_users/tasks/main.yml

@@ -73,3 +73,11 @@
   ansible.builtin.file:
     path: /etc/sudoers.d/adm
     state: absent
+
+- name: configure sshd
+  include_role: 
+    name: willshersystems.sshd
+  vars:
+    sshd_skip_defaults: false
+    sshd:
+      AllowUsers: "{{ admin_usernames | union(non_admin_usernames) | sort | join(' ') }}"