basic stracture and auth

in memory db :)

apps/mobile/src/app/(tabs)/_layout.tsx

@@ -0,0 +1,36 @@
+import { Tabs } from 'expo-router'
+import { Ionicons } from '@expo/vector-icons'
+
+export default function TabLayout() {
+  return (
+    <Tabs>
+      <Tabs.Screen
+        name="index"
+        options={{
+          title: 'Home',
+          tabBarIcon: ({ color, size }) => (
+            <Ionicons name="home" size={size} color={color} />
+          ),
+        }}
+      />
+      <Tabs.Screen
+        name="profile"
+        options={{
+          title: 'Profile',
+          tabBarIcon: ({ color, size }) => (
+            <Ionicons name="person" size={size} color={color} />
+          ),
+        }}
+      />
+      <Tabs.Screen
+        name="attendance"
+        options={{
+          title: 'Attendance',
+          tabBarIcon: ({ color, size }) => (
+            <Ionicons name="calendar" size={size} color={color} />
+          ),
+        }}
+      />
+    </Tabs>
+  )
+}