Added advanced audio handler

• Added DynamicAudio class, which allows you to use Unity's AudioSource datatype without worrying about volume relativity from the game.
• Added PlayerSettings class, which can grant you access to internal settings.
• Added For<T>() in Helper, allowing you to do an in-line iteration whilst including the index.
• Added Flatten() in Helper, allowing you to truncate any nested arrays into one long array.
• Added HexToColor() in StructHelper allowing you to convert any hexadecimal code into a Color32 struct.
• Fixed GetAllValues() from Helper so that properties and fields' values are correctly unwrapped.
• Fixed Replace() from StructHelper not allowing null values.
• Changed Tuple<T1, T2...> to inherit from tuples 1 smaller than itself, allowing you to cast or truncate the tuple.