Add chszlablib to Science section

[schulzchristian]

Summary

This PR adds CHSZLabLib to the Science > Other subcategory.

CHSZLabLib is a unified Python interface providing access to 20 high-performance C++ graph algorithm libraries developed at Heidelberg University. It covers:

• Graph partitioning (KaHIP, Mt-KaHIP, KaMinPar, Mt-KaMinPar, KaFFPa)
• Community detection / graph clustering (VieClus, VieCut clustering)
• Minimum cuts and balanced cuts (VieCut, NOI minimum cuts)
• Maximum independent sets (KaMIS, OnlineMIS)
• Dynamic graph algorithms (DynKatz, DynTriangleCounting)
• And more specialized solvers

Key details:

• Wraps 350k+ lines of C++ behind a clean Python API
• MIT licensed
• pip installable (pip install chszlablib)
• Interoperates with NetworkX, NumPy, and SciPy
• Placed alphabetically before colour in the Other subcategory