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

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

@@ -0,0 +1,8 @@
+/**
+ * Allows scheduling multiple timers (equivalent to `setTimeout(cb, delayMs)`)
+ * that are guaranteed to run in the same iteration of the event loop.
+ *
+ * @param delayMs - the delay to pass to `setTimeout`. (default: 0)
+ *
+ * */
+export declare function createAtomicTimerGroup(delayMs?: number): (callback: () => void) => NodeJS.Timeout;