chore(readme): clarify the use of ES modules in readme examples

packages/api-extractor-model/README.md

@@ -9,7 +9,7 @@ API documentation for this package: https://rushstack.io/pages/api/api-extractor
 ## Example Usage
 
 The following code sample shows how to load `example.api.json`, which would be generated by API Extractor
-when it analyzes a hypothetical NPM package called `example`:
+when it analyzes a hypothetical NPM package called `example`. The example uses [ES modules](https://nodejs.org/api/esm.html#enabling).
 
 ```ts
 import { ApiModel, ApiPackage } from '@discordjs/api-extractor-model';

packages/brokers/README.md

@@ -34,6 +34,8 @@ pnpm add @discordjs/brokers
 
 ## Example usage
 
+These examples use [ES modules](https://nodejs.org/api/esm.html#enabling).
+
 ### pub sub
 
 ```ts

packages/core/README.md

@@ -34,6 +34,8 @@ pnpm add @discordjs/core
 
 ## Example usage
 
+These examples use [ES modules](https://nodejs.org/api/esm.html#enabling).
+
 ```ts
 import { REST } from '@discordjs/rest';
 import { WebSocketManager } from '@discordjs/ws';

packages/discord.js/README.md

@@ -56,6 +56,8 @@ pnpm add discord.js
 bun add discord.js
 ```
 
+These examples use [ES modules](https://nodejs.org/api/esm.html#enabling).
+
 Register a slash command against the Discord API:
 
 ```js

packages/formatters/README.md

@@ -35,6 +35,8 @@ bun add @discordjs/formatters
 
 ## Example usage
 
+The example uses [ES modules](https://nodejs.org/api/esm.html#enabling).
+
 ````ts
 import { codeBlock } from '@discordjs/formatters';
 

packages/ws/README.md

@@ -40,6 +40,8 @@ bun add @discordjs/ws
 
 ## Example usage
 
+The example uses [ES modules](https://nodejs.org/api/esm.html#enabling).
+
 ```ts
 import { WebSocketManager, WebSocketShardEvents, CompressionMethod } from '@discordjs/ws';
 import { REST } from '@discordjs/rest';