In download_X() functions, make types more accessible

[patrick-weiss]

After using the download functions in a new project, I found the types not clear enough for the user. Should we highlight the types in the documentation?

Additionally, the function list_supported_types() should be mentioned if option 'type' is not supported. We might also consider an option in list_supported_types() to only show domain-specific types, and an option to automatically print all available types (instead of the tibble default length).

What do you think?

[christophscheuch]

I support all of your suggestions 👍🏻

[christophscheuch]

I updated the error message in case a type is not supported and I added the parameters domain and as_vector to the list_supported_types() function. I don't want to explicitly mention the types in the roxygen comments because this gets horrible to maintain.