Implement community-requested feedback into em parsers 1

[mkuehbach]

Aim/Expectation: How one parser for em capable of handling different imaging modalities (including EBSD)

(including EBSD as a feature is less relevant as having em_spctrscpy and em_om merged into em)

Part of the MVP provided em_spctrspcy and em_om are merged

• [x] Sabine Bergmann's (IKZ) feedback for generic SEM images
• [ ] Implement support for Changming's BCF
• [ ] Implement Abdulrhman/Julia/Annette Trunschke's fix for BCF
• [x] Draft NXcorrector_cs update for Thilo
• [x] Draft NXem workflow based on W. Hetaba's ChemiTEM paper

[mkuehbach]

After discussion with @sanbrock it was decided to postpone the implementation of the workflow as it became clear that descriptions of workflows are very specific for each lab. As an action point for the IKZ team we suggest that they should for now explore how they can document their workflow using custom schemas. Ones there are i) specific examples how this works and how users of the IKZ NOMAD Oasis instance clarify how they would like to document and use these workflows while they sit at the microscope, and ii) when one can add decision trees as a feedback in NeXus (if this is desired), it makes sense to pick up on this issue again