baiweiphys/BOPBK: BO-PBK v1.0 beta

First public release (beta) of BO-PBK. BO-PBK is a MATLAB code for analyzing waves and instabilities in obliquely propagating, magnetized multi-species hot plasmas. Key features: Supports anisotropic drift loss-cone product-bi-kappa (PBK), kappa-Maxwellian (KM), bi-Maxwellian (BM), and hybrid distributions Includes benchmark examples reproducing published results Pure MATLAB implementation (no additional toolboxes required) See README.md for detailed installation, usage, and examples. License: BSD 3-Clause