Add profile and login screen + first api logic draft

app/_layout.tsx

@@ -1,64 +1,14 @@
 import '../global.css';
-import { Tabs } from 'expo-router';
-import { Home, Clock, FileText, Zap, CalendarIcon } from 'lucide-react-native';
+import { AuthProvider } from '@/utils/authContext';
+import { Stack } from 'expo-router';
 
 export default function AppLayout() {
-  return (
-    <Tabs
-      screenOptions={{
-        headerShown: false,
-        tabBarStyle: {
-          backgroundColor: '#ffffff',
-          borderTopWidth: 1,
-          borderTopColor: '#f3f4f6',
-          height: 80,
-          paddingBottom: 20,
-          paddingTop: 10,
-        },
-        tabBarActiveTintColor: '#099499',
-        tabBarInactiveTintColor: '#9ca3af',
-        tabBarLabelStyle: {
-            fontSize: 10,
-            fontWeight: '600',
-            marginTop: 4
-        }
-      }}
-    >
-      <Tabs.Screen
-        name="index"
-        options={{
-          title: 'Home',
-          tabBarIcon: ({ color, size }) => <Home color={color} size={24} />,
-        }}
-      />
-      <Tabs.Screen
-        name="attendance/index"
-        options={{
-          title: 'Presenze',
-          tabBarIcon: ({ color, size }) => <Clock color={color} size={24} />,
-        }}
-      />
-      <Tabs.Screen
-        name="permits/index"
-        options={{
-          title: 'Permessi',
-          tabBarIcon: ({ color, size }) => <CalendarIcon color={color} size={24} />,
-        }}
-      />
-      <Tabs.Screen
-        name="documents/index"
-        options={{
-          title: 'Moduli',
-          tabBarIcon: ({ color, size }) => <FileText color={color} size={24} />,
-        }}
-      />
-      <Tabs.Screen
-        name="automation"
-        options={{
-          title: 'Domotica',
-          tabBarIcon: ({ color, size }) => <Zap color={color} size={24} />,
-        }}
-      />
-    </Tabs>
-  );
+    return (
+        <AuthProvider>
+            <Stack screenOptions={{ headerShown: false }}>
+                <Stack.Screen name="(protected)" />
+                <Stack.Screen name="login" />
+            </Stack>
+        </AuthProvider>
+    );
 }