refactor: Add GUI setup script and install graphical apps if GUI is detected

setup.sh

@@ -51,3 +51,11 @@ install_node_if_no_gui() {
 configure_terminal
 configure_apt_cacher
 install_node_if_no_gui
+
+if [ -z "$XDG_CURRENT_DESKTOP" ]; then
+        echo "No GUI detected, not installing graphical apps..."
+    else
+        echo "GUI detected, let's install some graphical apps!"
+        sudo chmod +x ./gui/setup.sh
+        ./gui/setup.sh
+    fi