Create Documentation for MDAnalysis with H5MD

**Description of the tutorial or documentation**
A worked example of using the outputted H5MD with MDAnalysis has been created but there is no documentation

Locate the existing worked example for using H5MD output with MDAnalysis and review the repository's documentation structure. Add a tutorial that explains this workflow, using the example as its basis. Done means the example is available in the project's documentation and can be followed by readers.

Written by the indexing model from the issue text.