add sketchybar mac settings and plugins, add skhd new key binds

configs/sketchybar_m/plugins/front_app.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# Some events send additional information specific to the event in the $INFO
+# variable. E.g. the front_app_switched event sends the name of the newly
+# focused application in the $INFO variable:
+# https://felixkratz.github.io/SketchyBar/config/events#events-and-scripting
+
+if [ "$SENDER" = "front_app_switched" ]; then
+  sketchybar --set $NAME label="$INFO" icon="$($CONFIG_DIR/plugins/icon_map_fn.sh "$INFO")"
+fi