update form from create book

src/app/components/create-book/create-book.ts

@@ -1,10 +1,11 @@
 import { Component } from '@angular/core';
 import {NzFormModule} from "ng-zorro-antd/form";
-import {FormControl, FormGroup, Validators} from "@angular/forms";
+import {FormControl, FormGroup, ReactiveFormsModule, Validators} from "@angular/forms";
+import {NzFlexDirective} from "ng-zorro-antd/flex";
 
 @Component({
   selector: 'app-create-book',
-  imports: [NzFormModule],
+    imports: [NzFormModule, ReactiveFormsModule, NzFlexDirective],
   templateUrl: './create-book.html',
   styleUrl: './create-book.css',
 })