Some work on Scripts

notable changes:
- rename `bt-connect` to `bt_connect`
- rename `music` to `media` and make it generic instead of checking
  Spotify
- make separate script to set background to a preset black image
- make all shebangs "#!/usr/bin/env sh"

Scripts/.local/scripts/status/memory

@@ -1,8 +1,8 @@
-#!/bin/bash
+#!/usr/bin/env sh
 
 line=$(free -m | sed -n 2p);
 used=$(echo $line | awk '{print $3}');
 available=$(echo $line | awk '{print $2}');
 value=$(echo "100 * $used / $available" | bc -l | xargs printf "%.2f" $1)
 
-echo "⾝ $(printf "%dMB" $used) $value%"
+echo "㊎ $(printf "%dMB" $used) $value%"