Doc: add a clear tutorial on how to select HDF5 datasets
Here is the content of an email that can help:
Sure.
You must:
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click on 'is hdf5'.
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Then select the detector dataset
2.1 click on 'upload a dataset'. Here it is misleading because for hdf5 you must select a file and a dataset.
2.2 go you go until the 'Silicon_111_reflection_0003.h5' file then you double click on it
then the 'file' tree should now appear and in this case it will look like:
2.3 you now need to go up to the detector dataset (pco_ffin this case if I am correct)
2.4 once the dataset selected press 'open'. Then the "data selection" widget should look like
- provide the path to the dataset
3.1 click on select and pick '1.1/instrument/positioners'
3.2 And then the 'dataset selection' should look like
3.3 We can press 'ok' and the 'dimension definition' will be triggered once the dataset is loaded.
- and then we are back to the "dimension definition" I was mentionning