feat: support author sorting (last name first), closes #1799 (#1865)

* [Issue #1799](https://github.com/readest/readest/issues/1799): Changing the name order when sorting the book by Author by placing the last name first in Arabic, Tibetan, German, English, Spanish, French, Hindi, Italian, Dutch, Polish, Portuguese, Russian, Thai, Turkish and Ukrainian languages

* refactor author sort

---------

Co-authored-by: Huang Xin <chrox.huang@gmail.com>

apps/readest-app/src/utils/book.ts

@@ -91,21 +91,38 @@ export const flattenContributors = (
       : formatLanguageMap(contributors?.name);
 };
 
+// prettier-ignore
+const LASTNAME_AUTHOR_SORT_LANGS = [ 'ar', 'bo', 'de', 'en', 'es', 'fr', 'hi', 'it', 'nl', 'pl', 'pt', 'ru', 'th', 'tr', 'uk' ];
+
+const formatAuthorName = (name: string, lastNameFirst: boolean) => {
+  if (!name) return '';
+  const parts = name.split(' ');
+  if (lastNameFirst && parts.length > 1) {
+    return `${parts[parts.length - 1]}, ${parts.slice(0, -1).join(' ')}`;
+  }
+  return name;
+};
+
 export const formatAuthors = (
   contributors: string | string[] | Contributor | Contributor[],
   bookLang?: string | string[],
+  sortAs?: boolean,
 ) => {
   const langCode = getBookLangCode(bookLang) || 'en';
+  const lastNameFirst = !!sortAs && LASTNAME_AUTHOR_SORT_LANGS.includes(langCode);
   return Array.isArray(contributors)
     ? listFormater(langCode === 'zh', langCode).format(
         contributors.map((contributor) =>
-          typeof contributor === 'string' ? contributor : formatLanguageMap(contributor?.name),
+          typeof contributor === 'string'
+            ? formatAuthorName(contributor, lastNameFirst)
+            : formatAuthorName(formatLanguageMap(contributor?.name), lastNameFirst),
         ),
       )
     : typeof contributors === 'string'
-      ? contributors
-      : formatLanguageMap(contributors?.name);
+      ? formatAuthorName(contributors, lastNameFirst)
+      : formatAuthorName(formatLanguageMap(contributors?.name), lastNameFirst);
 };
+
 export const formatTitle = (title: string | LanguageMap) => {
   return typeof title === 'string' ? title : formatLanguageMap(title);
 };