docs(Widget): Add the typedef WidgetChannel (#6182)

src/structures/Widget.js

@@ -17,6 +17,14 @@ class Widget extends Base {
     this._patch(data);
   }
 
+  /**
+   * Represents a channel in a Widget
+   * @typedef {Object} WidgetChannel
+   * @property {Snowflake} id Id of the channel
+   * @property {string} name Name of the channel
+   * @property {number} position Position of the channel
+   */
+
   /**
    * Builds the widget with the provided data.
    * @param {*} data The raw data of the widget