Add Ansible configuration and playbook for user creation; update Vagrantfile for playbook path

ansible/vytvor_uzivatele.yml

@@ -0,0 +1,9 @@
+---
+- hosts: all
+  become: yes
+  tasks:
+    - name: Přidat uživatele "novyuzivatel"
+      user:
+        name: novyuzivatel
+        shell: /bin/bash
+        create_home: yes