made it more modular

roles/base/tasks/users/install_public_keys.yml

@@ -0,0 +1,12 @@
+---
+- name: users | {{ user }} | install public ssh keys
+  authorized_key:
+    user: "{{ user }}"
+    state: present
+    key: "{{ item }}"
+  with_file:
+    - public_keys/id_dsa.pub
+    - public_keys/id_ed25519.pub
+    - public_keys/rene_id_rsa.pub
+    - public_keys/yubikey.pub
+    - public_keys/notebook_id_rsa.pub