waybar: use idle_inhibitor instead of custom module

.scripts/issu.sh

@@ -1,21 +1,23 @@
 #!/bin/sh
 
 if [ "$(id -u)" -eq 0 ]; then
-    exit 1
+    exit 0
 fi
 
 if [ -n "$SUDO_USER" ]; then
-    exit 1
+    exit 0
 fi
 
 if [ "$LOGNAME" != "$USER" ]; then
-    exit 1
+    exit 0
 fi
 
 ppid=$(ps -o ppid= -p $$ 2>/dev/null)
 if [ -n "$ppid" ]; then
     parent_comm=$(ps -o comm= -p "$ppid" 2>/dev/null)
     if [ "$parent_comm" = "su" ]; then
-        exit 1
+        exit 0
     fi
 fi
+
+exit 1