`habit.habitat_features`: quantify habitats

Built-in habitat feature extractors and their registry.

User guide: Habitat Guide Volume and fractions · Multiregional spatial interaction (MSI) · Intratumoral heterogeneity (ITH) · Habitat domain API. Component names: Habitat Spec component catalog.

Volume, MSI, ITH, graph, non-radiomics, and optional PyRadiomics families.

Classes

`HabitatFeatureExtractor`	Compute habitat-level features for one subject.
`HabitatVolumeFeatures`	Voxel counts and volume fractions of every habitat for one subject.
`IthHabitatFeatures`	ITH score for one subject's habitat map.
`MsiHabitatFeatures`	Multiregional spatial interaction features of one subject's habitat map.
`GraphHabitatFeatures`	Graph-topology features of one subject's habitat map.
`NonRadiomicsHabitatFeatures`	Basic spatial features of one subject's habitat map.
`EachHabitatRadiomicsFeatures`	PyRadiomics features of the raw image(s) within each habitat label.
`WholeHabitatRadiomicsFeatures`	PyRadiomics features of the habitat map treated as the image itself.
`TraditionalRadiomicsHabitatFeatures`	PyRadiomics features of the raw image(s) within the whole ROI.
`HabitatFeaturePanel`	Long table of one value per subject x habitat x feature.
`HabitatFeatureComparison`	Descriptive and (when n>=2) inferential habitat-vs-habitat contrast.
`HabitatFeatureTree`	Evaluate a habitat-level feature tree into one `FeatureTable`.
`HabitatFeatureExtractorRegistry`	Name-to-implementation registry for habitat feature extractors.

`to_habitat_feature_panel`	Melt a wide `each_habitat` table, or wrap an already-long frame.
`compare_habitat_features`	Contrast features across habitats for one subject or a cohort.
`build_habitat_extractor`	Build one habitat-level node: a leaf extractor or a combiner tree.