Create Library module. Moved book controller to library controller. Added series addition to library while adding all known volumes in background. Fixed Google search context.

backend/nestjs-seshat-api/src/books/dto/delete-book-status.dto.ts

@@ -0,0 +1,13 @@
+import { IsNotEmpty, IsOptional, IsUUID } from 'class-validator';
+import { UUID } from 'crypto';
+
+export class DeleteBookStatusDto {
+  @IsUUID()
+  @IsNotEmpty()
+  readonly bookId: UUID;
+
+  @IsUUID()
+  @IsNotEmpty()
+  @IsOptional()
+  readonly userId: UUID;
+}