REFACTOR(repo): simplify project structure

- Move services/nextjs to nextjs/
- Move deploy/docker/Dockerfile.prod to Dockerfile
- Add GitHub Actions workflows (ci.yml, build.yml)
- Remove deploy/, services/, scripts/ folders

nextjs/app/documents/layout.tsx

@@ -0,0 +1,45 @@
+"use client";
+
+import { Spinner } from "@/shared/ui/spinner";
+import { useRouter } from "next/navigation";
+import { Navigation } from "@/widgets/documents";
+import { useAuth } from "@/src/app/providers/auth-provider";
+import { useEffect } from "react";
+
+const MainLayout = ({ children }: { children: React.ReactNode }) => {
+  const { user, isLoading } = useAuth();
+  const router = useRouter();
+
+  useEffect(() => {
+    if (!isLoading && !user) {
+      router.push("/");
+    }
+  }, [isLoading, user, router]);
+
+  if (isLoading) {
+    return (
+      <div className="h-full flex items-center justify-center">
+        <Spinner size="lg" />
+      </div>
+    );
+  }
+
+  if (!user) {
+    return (
+      <div className="h-full flex items-center justify-center">
+        <Spinner size="lg" />
+      </div>
+    );
+  }
+
+  return (
+    <div className="h-full flex dark:bg-[#1F1F1F]">
+      <Navigation/>
+      <main className="flex-1 h-full overflow-y-auto">
+        {children}
+      </main>
+    </div>
+  );
+};
+
+export default MainLayout;