add login/sign-up page with dark/light mode

node_modules/next/dist/server/lib/router-utils/decode-path-params.d.ts

@@ -0,0 +1,9 @@
+/**
+ * We only encode path delimiters for path segments from
+ * getStaticPaths so we need to attempt decoding the URL
+ * to match against and only escape the path delimiters
+ * this allows non-ascii values to be handled e.g.
+ * Japanese characters.
+ * */
+declare function decodePathParams(pathname: string): string;
+export { decodePathParams };