Fix harp to work on paper and to play the right sound

[MonkeySaint]

The plugin wouldn't work on paper (at least modern paper) because of a call to org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader This replaces that with the built in java version. This also adds the error sound and fixes the harp to play the pling sound with the same pitches as in hypixel skyblock.

[Exortions]

was this tested on regular spigot as well?