resolve_country can return full names
Add country info to country_species_list()

Means country_id and country_name
Fix resolve_country tests
Fix examples in check_iucn_status
Refine warning message in check_iucn_status
Fix check_iucn_status examples
Implement internal get_iucn_pa_categories()
Implement country_stats
Update docs
Update vignette
Update NEWS and NAMESPACE