added resolvers, updated model, updated navbar

app/server/graphql/resolvers/bookOneResolver.ts

@@ -0,0 +1,17 @@
+import { IdentityContext } from '@app/server/identity';
+import { prisma } from '@app/server/prisma/client';
+import { Book, QueryBookOneArgs } from '@generated/types';
+import { toBookSchema } from './mappers/bookMapper';
+
+export async function BookOneResolver(
+  _: any,
+  { id }: QueryBookOneArgs,
+  { identity }: IdentityContext
+): Promise<Book> {
+  const model = await prisma.book.findUniqueOrThrow({
+    where: {
+      id
+    }
+  });
+  return toBookSchema(model);
+}