IsletCalc 0.0.1

• Initial release.
• insulin_release(): beta-cell insulin release indices (HOMA-beta, CIR, Stumvoll, Xinsdg30, Xinsg30, Di, Bigtt_air, Dibig) following Madsen et al. (2024) doi:10.1038/s42255-024-01140-6.
• glucagon_release(): fasting glucagon and glucagon AUC.
• glucagon_resistance(): glucagon suppression ratio and fasting glucagon:insulin ratio.