feat(dashboard): add transactions and users management pages with CRUD functionality

feat(auth): implement login page and authentication middleware
feat(sidebar): create sidebar component with user info and navigation links
feat(api): establish API client for interacting with backend services

apps/web/app/dashboard/layout.tsx

@@ -0,0 +1,19 @@
+import { ReactNode } from 'react'
+import Sidebar from '@/components/sidebar'
+
+export default function DashboardLayout({ children }: { children: ReactNode }) {
+  return (
+    <div className="flex h-dvh bg-background">
+      <Sidebar />
+
+      {/* Main content */}
+      <div className="flex min-w-0 flex-1 flex-col">
+        <main className="flex-1 overflow-y-auto pt-14 lg:pt-0">
+          <div className="mx-auto max-w-7xl px-4 py-6 sm:px-6 lg:px-8">
+            {children}
+          </div>
+        </main>
+      </div>
+    </div>
+  )
+}