Fix: Username unique index was case sensitive and this allowed duplicate names.

Feature: Moved temporal products into their own module and reverted the products module

bookie/src/app/temporal-product/temporal-product-resolver.service.ts

@@ -0,0 +1,19 @@
+import { Injectable } from '@angular/core';
+import { ActivatedRouteSnapshot, Resolve } from '@angular/router';
+import { Observable } from 'rxjs';
+
+import { Product } from '../core/product';
+
+import { TemporalProductService } from './temporal-product.service';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class TemporalProductResolverService implements Resolve<Product> {
+  constructor(private ser: TemporalProductService) {}
+
+  resolve(route: ActivatedRouteSnapshot): Observable<Product> {
+    const id = route.paramMap.get('id');
+    return this.ser.get(id as string);
+  }
+}