Added isbn field to books

Author: ltctceplrm

src/api/apis/OpenLibraryAPI.ts

@@ -69,6 +69,7 @@ export class OpenLibraryAPI extends APIModel {
 			dataSource: this.apiName,
 			url: `https://openlibrary.org` + result.key,
 			id: result.key,
+			isbn: result.isbn[0] ?? 'unknown',
 			englishTitle: result.title_english ?? result.title,
 
 			author: result.author_name ?? 'unknown',

src/models/BookModel.ts

@@ -9,6 +9,7 @@ export class BookModel extends MediaTypeModel {
 	image: string;
 	onlineRating: number;
 	english_title: string;
+	isbn: number;
 
 	released: boolean;
 
@@ -25,6 +26,7 @@ export class BookModel extends MediaTypeModel {
 		this.pages = undefined;
 		this.image = undefined;
 		this.onlineRating = undefined;
+		this.isbn = undefined;
 
 		this.released = undefined;