docs(cors): add comments to origin option

src/types/utils/cors.ts

@@ -1,6 +1,14 @@
 import type { HTTPMethod } from "..";
 
 export interface H3CorsOptions {
+ /**
+ * This determines the value of the "access-control-allow-origin" response header.
+ * The wildcard characters "*" can be used to allow all origins.
+ * An array of strings or regular expressions can be used with origin matching.
+ * And a custom function to validate the origin. It takes the origin as an argument and returns `true` if allowed.
+ * 
+ * @see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Origin
+ */
  origin?: "*" | "null" | (string | RegExp)[] | ((origin: string) => boolean);
  methods?: "*" | HTTPMethod[];
  allowHeaders?: "*" | string[];