[CODE] add support for Centos + extend ArchLinux support

tasks/usersetup-Centos.yml

@@ -0,0 +1,45 @@
+---
+# Common/Usersetup: Auto-setup a user shell and prepare dotfiles - CentOS Version
+# Will run once per user, because of lockfile `~/.ansbl-common-usersetup`
+
+- name: usersetup - Check, if usersetup already ran
+  stat:
+    path: .ansbl-common-usersetup
+  register: common_usersetup
+
+- name: usersetup - Change login shell to zsh for current user
+  become: yes
+  user:
+    name: "{{ ansible_user_id }}"
+    shell: /bin/zsh
+  when:
+    - common_usersetup.stat.exists == false and usersetup_chsh == true
+
+# TODO: adapt to CentOS/ RHEL systems, if needed
+# - name: usersetup - Install locales package
+#   become: yes
+#   apt:
+#     name: locales
+#     state: present
+
+# - name: usersetup - Setup locale en_US
+#   become: yes
+#   locale_gen:
+#     name: en_US.UTF-8
+#     state: present
+#   when:
+#     - common_usersetup.stat.exists == false
+# - name: usersetup - Setup locale de_DE
+#   become: yes
+#   locale_gen:
+#     name: de_DE.UTF-8
+#     state: present
+#   when:
+#     - common_usersetup.stat.exists == false
+
+- name: usersetup - Create lockfile
+  file:
+    path: .ansbl-common-usersetup
+    state: touch
+  when:
+    - common_usersetup.stat.exists == false