Add scripts to a namespace

[BlueAmulet]

None of the scripts in this repository seem to use a namespace, this can lead to conflicts with other C# code in the event that they happen to use the same class name, even if the other class is in a namespace.

An actual example of this is compilation errors with this and BetterPlayerAudio, due to both packages containing a class called PlayerList. I had to force resolve the class by adding the full type name.