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/pkgs/RedHat/kitty.yml

@@ -0,0 +1,4 @@
+---
+- name: add to syspkgs
+  ansible.builtin.set_fact:
+    syspkgs: "{{ (syspkgs | default([])) + ['kitty', 'kitty-shell-integration'] }}"