blissdata: Supports lima data frame v4
This PR mostly supports the new image frame format from Lima (v4).
This exposes a acq_tag from the decoded frame. For older versions, this is equal to None.
The previous BLISS decoder was anyway able to decode the format v4, without exposing this acq_tag.
Plus some cleanup.
- More accurate static typing
- Some embedded documentation
- Move the image decoding tests into blissdata project
This could be backported to BLISS 2.0.x.
Edited by Valentin Valls