Updates, new packages, new image "Keras3-gpu"

• add new docker image keras3-gpu-notebook with TensorFlow >= 2.16
• update code-server to 4.91.0
• add python packages:
  • umap-learn: dimensionality reduction algorithm
  • hdbscan: clustering algorithm
  • lxml: dependency for pandas.read_html
  • contextily: map backgrounds in geopandas static plots
  • networkx: graph-based data library
  • pyvis: interactivate network plot based on java script
  • netgraph: interactivate network plot based on matplotlib