Add toast api on standard api (#3077)

* Add toast api to standard api

* add it back

* remove from docs for now

* Add changeset

Author: oluwatimio

.changeset/warm-pans-wash.md

@@ -0,0 +1,5 @@
+---
+'@shopify/ui-extensions': patch
+---
+
+Add toast api on customer accounts standard api

packages/ui-extensions/src/surfaces/customer-account/api/shared.ts

@@ -652,3 +652,10 @@ export interface TrackingConsentChangeResultError {
    */
   message: string;
 }
+
+export interface ToastApiResult {
+  hide: () => void;
+}
+export interface ToastApi {
+  show: (content: string) => ToastApiResult;
+}

packages/ui-extensions/src/surfaces/customer-account/api/standard-api/standard-api.ts

@@ -12,6 +12,7 @@ import {
   Analytics,
   CustomerPrivacy,
   ApplyTrackingConsentChangeType,
+  ToastApi,
 } from '../shared';
 
 import type {ExtensionTarget} from '../../extension-targets';
@@ -101,6 +102,23 @@ export interface StandardApi<Target extends ExtensionTarget = ExtensionTarget> {
    */
   ui: Ui;
 
+  /**
+   * The Toast API displays a non-disruptive message that displays at the bottom
+   * of the interface to provide quick, at-a-glance feedback on the outcome
+   * of an action.
+   *
+   * How to use:
+   *
+   * - Use toasts to confirm successful actions.
+   *
+   * - Aim for two words.
+   *
+   * - Use noun + past tense verb format. For example, \`Changes saved\`.
+   *
+   * For errors, or information that needs to persist on the page, use a [banner](/docs/api/checkout-ui-extensions/unstable/components/feedback/banner) component.
+   */
+  toast: ToastApi;
+
   navigation: StandardExtensionNavigation;
 
   /**