Add support for setting default mapping ID (#1118)

* create an optional dependency group for wk-libs examples

* remove nifti script to avoid sklearn dependency

* fix optional marker

* add default layer properties for mappings

* changelog

* Update webknossos/webknossos/dataset/properties.py

---------

Co-authored-by: Florian M <[email protected]>

Author: hotzenklotz

webknossos/Changelog.md

@@ -19,6 +19,7 @@ For upgrade instructions, please check the respective _Breaking Changes_ section
 - Added a pixel level heuristic for distinguishing color and segmentation layers when importing image data with the `from_images` or `add_layer_from_images` method. [#1007](https://github.com/scalableminds/webknossos-libs/pull/1007)
 - Added .ims as supported suffix. [#1085](https://github.com/scalableminds/webknossos-libs/pull/1085)
 - Added suffixes supported by bioformats for Zeiss CZI, Leica LOF, Zeiss LSM (laser scanning microscope), Zeiss LSM (Laser Scanning Microscope) 510/710, Leica XLEF and Zeiss AxioVision ZVI (Zeiss Vision Image). [#1086](https://github.com/scalableminds/webknossos-libs/pull/1086)
+- Added suport for setting a default ID mapping for segmentation layers. [1118](https://github.com/scalableminds/webknossos-libs/pull/1118)
 
 ### Changed
 - Moved functional parts of merge volume annotation CLI to Dataset and Annotation classes. [#1055](https://github.com/scalableminds/webknossos-libs/pull/1055)

webknossos/webknossos/dataset/properties.py

@@ -113,6 +113,9 @@ class LayerViewConfiguration:
     is_in_edit_mode: Optional[bool] = None
     """Enable the histogram edit mode. The WEBKNOSSOS default is False."""
 
+    mapping: Optional[Dict[str, str]] = None
+    """Enables ID mapping for a segmentation layer and applies the selected mapping by default. The default WK behavior is to disable ID mapping. Expected values is a Dict with {"name": my_mapping_name, "type": "HDF5"}."""
+
 
 # --- Property --------------------