Add nn(), like bb() but with a memo hint

dotfiles/bash/main.bashrc

@@ -22,6 +22,16 @@ bb() {
     printf '\a'
 }
 
+nn() {
+    #
+    # Ring the bell and send notification $1
+    #
+    local msg=${1:-this is done}
+    bb
+    echo -e "hey, \033[1;31m$msg\033[1;0m!"
+    notify-send -a 'nn()' "hey, $msg"
+}
+
 dt() {
     #
     # Open $1 new terminals