add initial marp implementation with sample content and build configuration

node_modules/chromium-bidi/lib/esm/utils/urlHelpers.d.ts

@@ -0,0 +1,8 @@
+/**
+ * A URL matches about:blank if its scheme is "about", its path contains a single string
+ * "blank", its username and password are the empty string, and its host is null.
+ * https://html.spec.whatwg.org/multipage/urls-and-fetching.html#matches-about:blank
+ * @param {string} url
+ * @return {boolean}
+ */
+export declare function urlMatchesAboutBlank(url: string): boolean;