Very long "Software Management" page

The entire "Software Management" page is getting really long. It might be worth splitting it into sub-files (can one have collapsible hierarchies in the left menu?)

• Software Management
  • sciCORE managed software modules
  • Managing Python environments
    • conda/mamba
    • pip
    • uv
    • pixi
  • R environment
  • Working with Matlab
  • Containers

It might also make sense to include the 'Conda issues' with the description of conda/mamba.