ET0TempModels 1.0.0

• Initial release of the temperature-based ET0 models package.
• 10 temperature-based empirical ET0 models (Blaney-Criddle, Schendel, Hargreaves-Samani, Linacre, Tabari-Talaee 1 & 2, Droogers-Allen, Berti et al., Dorji et al., Baier-Robertson).
• FAO Penman-Monteith standard method as reference/base model.
• 9 statistical evaluation metrics (NSE, d, MSE, RMSE, NRMSE, MAE, MBE, r, R-squared).
• Visualization functions: scatter plots, Taylor diagrams, monthly comparison plots, annual bar charts.
• Sample meteorological dataset from a semi-arid region in India (Jhansi).
• Helper functions for solar geometry, vapor pressure, and other intermediate calculations.