Geospatial helpers for tidy biodiversity workflows

Native tidyverse-style verbs for spatial biodiversity analysis. Sites become sf tables, rasters join as columns, occurrence records are cleaned without calling CoordinateCleaner, distances feed tidydiversity::beta_decay(), Hill numbers map with ggplot2, and Moran's I diagnoses spatial autocorrelation without requiring spdep at run time.

Suggested packages: sf (site tables and maps), terra (raster extraction). rgbif is optional for live downloads; spdep and CoordinateCleaner are used only in tests when installed.