feat: add moonarch-update wrapper for interactive system updates

Wraps paru in a script that waits for keypress after completion,
preventing foot from closing immediately. Used as Waybar on-click
action for the updates module.

defaults/bin/moonarch-update

@@ -0,0 +1,7 @@
+#!/usr/bin/bash
+# ABOUTME: Interactive system update wrapper for use as Waybar on-click action.
+# ABOUTME: Runs paru and waits for keypress before closing the terminal.
+
+paru
+echo
+read -n 1 -s -r -p "Press any key to close..."

defaults/xdg/waybar/config

@@ -207,7 +207,7 @@
         },
         "exec": "moonarch-waybar-updates",
         "interval": 60,
-        "on-click": "foot paru"
+        "on-click": "foot moonarch-update"
     },
     "custom/notification": {
         "tooltip": true,