Add convenience functions to use WellAcquistions with multiview-stitcher

[tibuch]

#105 shows that multiview-stitcher can be used easily with our WellAcquistions. For easier use it would be convenient to add additional methods to WellAcquisition to easily obtain the

• tile_translations,
• tile_scales,
• and tile_paths
  lists.

In the proof of concept just a single z slice was used. It would make sense to work on maximum intensity projections and load them lazy.

[imagejan]

Suggestion:

• add stitching functionality to WellAcquisition class
• change ConvertToNGFFPlate to accept list of WellAcquisitions instead of PlateAcquisition