Ensure an aur_builder user if installing dev tools using AUR

tasks/sublime_text_archlinux.yml

@@ -1,4 +1,19 @@
 ---
+- name: Create an AUR user
+  become: yes
+  user:
+    name: aur_builder
+    create_home: no
+    group: wheel
+
+- name: Allow AUR user to run pacman with elevated privileges
+  become: yes
+  lineinfile:
+    path: /etc/sudoers.d/11-install-aur_builder
+    line: 'aur_builder ALL=(ALL) NOPASSWD: /usr/bin/pacman'
+    create: yes
+    validate: 'visudo -cf %s'
+
 - name: Install Sublime Text (on Archlinux)
   block:
   - name: Remove outdated repository for Sublime Text