feat: Add store to manage categories (#5127)

app/javascript/dashboard/api/specs/helpCenter/categories.spec.js

@@ -0,0 +1,12 @@
+import categoriesAPI from '../../helpCenter/categories';
+import ApiClient from '../../ApiClient';
+
+describe('#BulkActionsAPI', () => {
+  it('creates correct instance', () => {
+    expect(categoriesAPI).toBeInstanceOf(ApiClient);
+    expect(categoriesAPI).toHaveProperty('get');
+    expect(categoriesAPI).toHaveProperty('create');
+    expect(categoriesAPI).toHaveProperty('update');
+    expect(categoriesAPI).toHaveProperty('delete');
+  });
+});