Implement the custom role concept

- Custom Ansible roles can be stored in the `roles/custom` directory
- The list `custom_roles` determines which roles are included

roles/custom/fvs/tasks/sync.yml

@@ -0,0 +1,58 @@
+---
+- name: Create directory for local .desktop-Files
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    mode: '0755'
+  loop:
+    - /usr/local/share/applications
+    - /usr/local/share/desktop-directories
+  notify: Run update-desktop-database
+
+- name: Copy fvs.directory
+  ansible.builtin.copy:
+    src: fvs.directory
+    dest: /usr/local/share/desktop-directories/
+    mode: '0644'
+  notify: Run update-desktop-database
+
+- name: Copy fvs.menu
+  ansible.builtin.copy:
+    src: fvs.menu
+    dest: /etc/xdg/menus/applications-merged/
+    mode: '0644'
+  notify: Run update-desktop-database
+
+- name: Copy lmn-sync script
+  ansible.builtin.copy:
+    src: lmn-sync
+    dest: /usr/local/sbin/
+    mode: '0755'
+  register: lmn_sync
+
+- name: Run lmn-sync script
+  ansible.builtin.shell: /usr/local/sbin/lmn-sync
+  when: lmn_sync.changed # noqa: no-handler
+
+- name: Deploy sudo configurations (lmn-sync for role-teacher)
+  ansible.builtin.copy:
+    dest: /etc/sudoers.d/90-lmn-sync
+    owner: root
+    group: root
+    mode: '0700'
+    content: |
+      %role-teacher ALL=(root) NOPASSWD: /usr/local/sbin/lmn-sync
+
+- name: Provide lmn-sync service and timer
+  ansible.builtin.copy:
+    src: "{{ item }}"
+    dest: "/etc/systemd/system/{{ item }}"
+    mode: '0644'
+  loop:
+    - lmn-sync.service
+    - lmn-sync.timer
+
+- name: Enable lmn-sync.timer
+  ansible.builtin.systemd:
+    name: lmn-sync.timer
+    enabled: true