Volumes & Segmentations extension (#668)

* Created CellStar state action

* CellStar: download metadata

* Right panel - CellStar UI

* CellStar: Lattice segmenatation and fitted PDB models

* CellStar: Support for source-database entry ID from metadata

* CellStar: Mesh segmentation

* CellStar: Switching between multiple entries

* CellStar: Changed default API URL

* UI updates

* CellStar: Clicking on meshes shows annotations...

* support info in Converted param

* support color/size in VolumeRepresentation3DHelpers.getDefaultParams

* support multi-visual volume representations

- repr can provide list of keys
- create visual for each key

* add volume segmentation support

- segmentation property
- segment loci & location

* add volume-segment color theme

* add volume segment representation

* use optional chaining

* add support for volume segmentation cif

* improve isosurface bounding-sphere

* fix segcif schema type

* CellStar: Highlighting segments on hover in the right panel

* CellStar: Using new Mol*-native segment visualization

* lint

* Segmentation volume can have custom segment labels

* CellStar: Segment labels for Mol*-native segments

* CellStar: Removed old implementation of segments

* CellStar: Rename CellStarLatticeSegmentationData2 -> CellStarLatticeSegmentationData

* CellStar: Default volume server is https://cellstar.ncbr.muni.cz



* CellStar: debugging

* CellStar: Fixed bug in LatticeSegmentation (scaling)

* CellStar: Partially savable state

* CellStar: WaitingSlider

* CellStar: Opacity changed via params

* Savable state for opacity

* CellStar: Changing UI in animations

* CellStar: Savable state for whole current UI

* CellStar: Savable state for segment labels

* CellStar: Source can be 'idr', CellStarVolumeServerConfig.DefaultServer

* CellStar: Select segment for lattice segmentation

* CellStar: Select segment, complete

* CellStar: Changes visible labels to "Volume & Segmentation"

* CellStar: Drop list with available entries

* CellStar: Volume type switching (partial)

* CellStar: Trying to set direct-volume control points

* CellStar: Volume visual switching

* Mesh extension: removed molstar-lib-imports

* CellStar: Global options

* CellStar: Updated file headers and `CHANGELOG.md`

* CellStar: UI controls disabled while executing change

* CellStar: Hidden state nodes, fixed bug with removed global state

* CellStar: Volume opacity slider

* CellStar extension renamed to Volseg

* UI tweaks

Co-authored-by: Alexander Rose <alexander.rose@weirdbyte.de>