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/addpkg.yml

@@ -0,0 +1,11 @@
+---
+- name: add custom pkg if available
+  ansible.builtin.include_tasks:
+    file: "pkgs/{{ ansible_os_family }}/{{ pkg }}.yml"
+  register: cadd_pkg
+  ignore_errors: true
+  tags:
+    - packages
+
+- debug:
+    var: cadd_pkg