v0.3.0

Release Notes

Changed

• Refactor the Rust code base to use ndarray instead of nalgebra for
  matrix operations since the Python API uses numpy. This change
  improves the performance of the code as it avoids unnecessary
  conversions between nalgebra and numpy arrays.
• Added specialized Vec2D structure to replace generic Array1<f64> for 2D vectors
• Improved memory management with preallocation and reduced temporary allocations
• Optimized mathematical operations with direct 2D vector calculations
• Added lazy_static Hermitian matrix to avoid recreation
• Eliminated redundant vector storage and minimized cloning
• Improved Gaussian smoothing for better cache utilization
• Fixed thread safety issues for proper parallel execution