Feature: Paged customer list.

bookie/src/app/core/paged-result.ts

@@ -0,0 +1,17 @@
+export class PagedResult<T> {
+  items: T[];
+  page: number; // current page (zero-based)
+  pageSize: number; // items per page
+  total: number; // total items in all pages
+  totalPages: number;
+  field?: string; // active sort column
+  sortDirection?: 'asc' | 'desc'; // sort direction
+
+  constructor(items: T[], page: number, pageSize: number, total: number) {
+    this.items = items;
+    this.page = page;
+    this.pageSize = pageSize;
+    this.total = total;
+    this.totalPages = Math.ceil(total / pageSize);
+  }
+}