`H5Dataset<T>` should accept `byte[]` as data input

[Apollo3zehn]

This is a problem, i.e. H5Dataset<T> cannot handle raw data bytes:

var dataAsBytes = Encoding.Unicode.GetBytes(textEntry.Value);
var data = MemoryMarshal.Cast<byte, ushort>(dataAsBytes).ToArray();

var dataset = new H5Dataset<ushort[]>(data);

[Apollo3zehn]

The same applies to H5NativeWriter