Add deprecation notice for Storybook 9 in @web/mocks

Author: Guilherme da Silva Amorim

packages/mocks/rollup-plugin.js

@@ -6,6 +6,9 @@ import path from 'node:path';
 
 const require = createRequire(import.meta.url);
 
+/**
+ * @deprecated `@web/mocks` is deprecated and only supports up to Storybook 8. Please migrate to `@web/storybook-addon-mocks` for Storybook 9 support.
+ **/
 export function mockRollupPlugin(
   { interceptor } = {
     interceptor: '',

packages/mocks/storybook/addon/decorator.js

@@ -6,5 +6,6 @@ import { createDecorator } from './create-decorator.js';
 // Storybook 7+
 /**
  * @type {ReturnType<typeof makeDecorator>}
- */
+ * @deprecated `@web/mocks` is deprecated and only supports up to Storybook 8. Please migrate to `@web/storybook-addon-mocks` for Storybook 9 support.
+ **/
 export const withMocks = createDecorator(addons, makeDecorator);

packages/mocks/storybook/decorator.js

@@ -4,4 +4,8 @@ import { addons, makeDecorator } from '@web/storybook-prebuilt/addons';
 import { createDecorator } from './addon/create-decorator.js';
 
 // Storybook 6
+
+/**
+ * @deprecated `@web/mocks` is deprecated and only supports up to Storybook 8. Please migrate to `@web/storybook-addon-mocks` for Storybook 9 support.
+ **/
 export const withMocks = createDecorator(addons, makeDecorator);

packages/mocks/wds-plugin.js

@@ -3,6 +3,9 @@ import { readFileSync } from 'node:fs';
 
 const require = createRequire(import.meta.url);
 
+/**
+ * @deprecated `@web/mocks` is deprecated and only supports up to Storybook 8. Please migrate to `@web/storybook-addon-mocks` for Storybook 9 support.
+ **/
 export function mockPlugin() {
   return {
     name: 'wds-plugin-msw',