Honor H5Name for Compound Writing

[Blackclaws]

When writing compound datatypes H5Name is used during read but not for writing.

Not urgent in any case but I saw tried this and it didn't work.

[Apollo3zehn]

You need a field/property name mapper for both, reading and writing to take the attribute into account. PureHDF itself has no logic to make use of that attribute. Here is an example from the tests of how to create and use such a mapper:

https://github.com/Apollo3zehn/PureHDF/blob/f7d1521d32e8faa943993befa9eac66572761ce3/tests/PureHDF.Tests/Writing/DatasetTests%40datatypes.cs#L27-L43

If reading is working without this mapper, I am a bit confused :-)

[Apollo3zehn]

Maybe I need to update the docs.

[Blackclaws]

Ah! I think I missed that in the docs and thought that similar to how Json serializers work it would automatically pick them up.