chore(types): add tsdocs

packages/react/src/additional-components/Background/types.ts

@@ -1,11 +1,20 @@
 import { CSSProperties } from 'react';
 
+/**
+ * The three variants are exported as an enum for convenience. You can either import
+ * the enum and use it like `BackgroundVariant.Lines` or you can use the raw string
+ * value directly.
+ * @public
+ */
 export enum BackgroundVariant {
   Lines = 'lines',
   Dots = 'dots',
   Cross = 'cross',
 }
 
+/**
+ * @expand
+ */
 export type BackgroundProps = {
   id?: string;
   /** Color of the pattern */