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

node_modules/next/dist/build/babel/loader/util.d.ts

@@ -0,0 +1,16 @@
+import type { TransformOptions } from 'next/dist/compiled/babel/core';
+export declare function consumeIterator(iter: Iterator<any>): any;
+/**
+ * Source map standard format as to revision 3.
+ *
+ * `TransformOptions` uses this type, but doesn't export it separately
+ */
+export type SourceMap = NonNullable<TransformOptions['inputSourceMap']>;
+/**
+ * An extension of the normal babel configuration, with extra `babel-loader`-specific fields that transforms can read.
+ *
+ * See: https://github.com/babel/babel-loader/blob/main/src/injectCaller.js
+ */
+export type BabelLoaderTransformOptions = TransformOptions & {
+    target?: string;
+};