v0.2.0

• Added fitted(), parameter(), and quantile() methods.
• Updated predict() and simulate() methods: both now return results for the training data by default when Xnew is not provided.
• Extended plot() method with new dims argument for higher-dimensional inputs.
• Added Section 5 to the vignette, presenting a real-data application on Loa loa parasite infection in North Cameroon.
• Added argument checking with informative error messages.