dwmblocks/statusbar: starting to add clickable buttons

LukeSmith made a guide on how to set this up.
I did it analog to him.
- clock shows the calendar
- internet shows nmtui

.local/bin/tools/statusbar/clock

@@ -1,5 +1,7 @@
 #!/bin/sh
 
-# by lukesmithxyz, checkout github.com/lukesmithxyz/voidrice
-
 date +" %d %b %H:%M"
+
+case $BLOCK_BUTTON in
+	1) notify-send "This Month" "$(cal --color=always | sed "s/..7m/<b><span color=\"red\">/;s/..27m/<\/span><\/b>/")" ;;
+esac