i3: add open-messaging script

i3/i3/scripts/open-messaging

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+start_if_not_running()
+{
+    program=$1
+    pidof -sq $program
+    if [ "$?" -eq "1" ]; then
+        start_program $1
+    else
+        echo "$program is already running"
+    fi
+}
+
+start_program()
+{
+    program=$1
+    echo "Starting $program..."
+    $program & > /dev/null
+}
+
+start_program schildichat-desktop
+start_program telegram-desktop
+start_program thunderbird