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

node_modules/next/dist/server/app-render/app-render-render-utils.d.ts

@@ -0,0 +1,8 @@
+/**
+ * This is a utility function to make scheduling sequential tasks that run back to back easier.
+ * We schedule on the same queue (setTimeout) at the same time to ensure no other events can sneak in between.
+ *
+ * The first function runs in the first task. Each subsequent function runs in its own task.
+ * The returned promise resolves after the last task completes.
+ */
+export declare function runInSequentialTasks<R>(first: () => R, ...rest: Array<() => void>): Promise<Awaited<R>>;