add greetd package

tasks/config/greetd.yml

@@ -0,0 +1,4 @@
+- name: Set config for greetd
+  ansible.builtin.set_fact:
+    greetd:
+      pkg: "{{ pkgconfig.greetd.pkg[ansible_os_family] }}"

tasks/pkgs/greetd.yml

@@ -0,0 +1,13 @@
+# vim: set filetype=yaml.ansible :
+---
+- name: Add greetd
+  when:
+    - greetd_configured is undefined
+  block:
+    - name: Append greetd to pkg_sys
+      ansible.builtin.set_fact:
+        pkg_sys: "{{ pkg_sys + [greetd.pkg] }}"
+
+    - name: Set greetd_configured
+      ansible.builtin.set_fact:
+        greetd_configured: true