feat: Add Bioxel asset catalog and layer management functionality

- Introduced a new asset catalog definition file for Blender to manage Bioxel assets.
- Implemented layer caching and snapshot functionality in `layer.py`, allowing for VDB file generation and low-resolution snapshots.
- Created node management functions in `node.py` for handling Bioxel nodes within Blender's Geometry Node Editor.
- Added an operator to extract mesh data from selected nodes in `structure.py`.
- Developed UI panels in `panels.py` for layer management, including import options and layer library display.

pyproject.toml

@@ -12,6 +12,7 @@ dependencies = [
     "mrcfile==1.5.1",
     "h5py==3.11.0",
     "transforms3d==0.4.2",
+    "matplotlib==3.10.7",
 ]
 
 [dependency-groups]
@@ -25,6 +26,7 @@ dev = [
     "autopep8>=2.3.1,<3",
     "mike>=2.1.2,<3",
     "tomlkit>=0.13.0,<0.14",
+    "pip>=25.3",
 ]
 
 [build-system]