v2.7.0

• New features
  • Add k-points!
    • Add k-point dependent calculations
    • Add a k-points object
    • Add a band structure, k-point, and Brillouin zone viewer
    • Add minimization functions for fixed Hamiltonians
  • Add a symmetry extra to symmetrize k-points
• Updated docs
  • Add k-point examples
  • Increase coverage precision
• Coding style
  • Activate several Ruff rules
  • Lint check notebooks
  • Rewrite operator handling
  • Add a lot of new tests
• Miscellaneous
  • Add a contour line viewer
  • Plot lattice vectors in the view_atoms function
  • Add a NixOS CI test
  • Add a Nix lock file
  • Use Python 3.12 as the CI base image
  • Move Matplotlib to dev extras
  • Unpin the notebook version
  • Small performance improvements, e.g, in Atoms object creation
• Experimental
  • Smearing functionalities
  • Density of states function