Adding book autoref names

[daleif]

Memoir supports a \book command that lives above \part. Currently memhfixc adds \bookautorefname for a few languages.

I was wondering if it made more sense to add these to hyperref instead? I used some AI to get to the names listed below which should cover the \HyLang@<lang> languages already in hyperref

afrikaans: \def\bookautorefname{Boek}                                                                    
english: \def\bookautorefname{Book}                                                                      
french: \def\bookautorefname{Livre}                                                                      
german: \def\bookautorefname{Buch}                                                                       
italian: \def\bookautorefname{Libro}                                                                     
magyar: \def\bookautorefname{K\"onyv}                                                                    
portuges: \def\bookautorefname{Livro}                                                                    
russian: \def\bookautorefname{\CYRK\cyrn\cyri\cyrg\cyrr\cyra}
spanish: \def\bookautorefname{Libro}                                                                     
catalan: \def\bookautorefname{Llibre}                                                                    
vietnamese: \def\bookautorefname{T\d{\^{a}}ps\'{a}ch}
greek: \def\bookautorefname{\textBeta\textiota\textbeta\textlambda\'\textiota\textomicron}                                   
dutch: \def\bookautorefname{Boek}                                                                        
norsk: \def\bookautorefname{Bok}                                                                         
danish: \def\bookautorefname{Bog}
swedish: \def\bookautorefname{Bok}

I of course does not know if these are the proper terms in all languages.