feat(bootstrap): add desktop environment support with configurable DE, DM, and display target

roles/bootstrap/tasks/main.yml

@@ -34,6 +34,10 @@
     bootstrap_var_key: "{{ 'bootstrap_' + (os | replace('-lts', '') | replace('-', '_')) }}"
   ansible.builtin.include_tasks: "{{ bootstrap_os_task_map[os] }}"
 
+- name: Install desktop environment packages
+  when: system_cfg.features.desktop.enabled | bool
+  ansible.builtin.include_tasks: _desktop.yml
+
 - name: Ensure chroot uses live environment DNS
   ansible.builtin.file:
     src: /run/NetworkManager/resolv.conf