feat: tambah sistem guide onboarding per fitur dengan GuideOverlay

- Buat komponen GuideOverlay dengan animasi fade+slide, arrow tooltip, dan dot indicator
- Buat hook useGuide untuk menyimpan state guide per fitur via AsyncStorage
- Sentralisasi semua step guide di lib/guideSteps.ts
- Pasang guide pada 12 halaman: village-calendar, project detail, banner, group, position, member, announcement, discussion, division calendar/document/discussion, dan division task detail
- Posisi card menggunakan cardTopRatio (rasio layar) untuk kompatibilitas berbagai ukuran device
- Tambah styles guide dan village calendar di constants/Styles.ts

lib/useGuide.ts

@@ -0,0 +1,28 @@
+import AsyncStorage from '@react-native-async-storage/async-storage';
+import { useEffect, useState } from 'react';
+
+const KEY_PREFIX = '@guide:';
+
+export function useGuide(featureKey: string) {
+   const [visible, setVisible] = useState(false);
+   const [checked, setChecked] = useState(false);
+
+   useEffect(() => {
+      AsyncStorage.getItem(KEY_PREFIX + featureKey).then((val) => {
+         if (!val) setVisible(true);
+         setChecked(true);
+      });
+   }, [featureKey]);
+
+   async function dismiss() {
+      setVisible(false);
+      await AsyncStorage.setItem(KEY_PREFIX + featureKey, 'done');
+   }
+
+   async function reset() {
+      await AsyncStorage.removeItem(KEY_PREFIX + featureKey);
+      setVisible(true);
+   }
+
+   return { visible: checked && visible, dismiss, reset };
+}