adjust pkg list generation

- add a custom pkg definition if it exists
- if it doesn't exist, assume it's a package manager packge name

tasks/main.yml

@@ -1,7 +1,7 @@
 ---
 - name: generate package installation lists
   ansible.builtin.include_tasks:
-    file: "pkgs/{{ ansible_os_family }}/{{ pkg }}.yml"
+    file: addpkg.yml
   loop: "{{ packages }}"
   loop_control:
     loop_var: pkg