Add `gdverse` package to the Spatial Task View

[SpatLyu]

This pull request adds the gdverse package to the Spatial Task View.

gdverse provides an integrated and extensible toolkit for analyzing spatial stratified heterogeneity and spatial associations using the geographical detector methodology. It includes core functions for computing the q-statistic, performing spatial factor exploration, and modeling spatial interactions between variables. The package supports various geographical detector models and provides high-performance implementations for their efficient execution.

I believe gdverse would be a valuable addition to the Spatial Task View, particularly in the areas of spatial association and spatial stratified heterogeneity modeling.

Thank you for considering this contribution.