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/playlist_choice

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env sh
 choice=$(mpc playlist | dmenu -i)
 if [[ -n "$choice" ]]
 then
@@ -7,4 +7,3 @@ then
 else
     echo "No choice given"
 fi
-