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

app/(application)/position/index.tsx

@@ -1,3 +1,4 @@
+import GuideOverlay from "@/components/GuideOverlay";
 import BorderBottomItem from "@/components/borderBottomItem";
 import { ButtonForm } from "@/components/buttonForm";
 import ButtonTab from "@/components/buttonTab";
@@ -13,6 +14,8 @@ import WrapTab from "@/components/wrapTab";
 import Styles from "@/constants/Styles";
 import { apiDeletePosition, apiEditPosition, apiGetPosition } from "@/lib/api";
 import { setUpdatePosition } from "@/lib/positionSlice";
+import { GUIDE_POSITION } from "@/lib/guideSteps";
+import { useGuide } from "@/lib/useGuide";
 import { useAuthSession } from "@/providers/AuthProvider";
 import { useTheme } from "@/providers/ThemeProvider";
 import { AntDesign, Feather, MaterialCommunityIcons } from "@expo/vector-icons";
@@ -48,6 +51,7 @@ export default function Index() {
    const queryClient = useQueryClient()
    const [refreshing, setRefreshing] = useState(false)
    const [showDeleteModal, setShowDeleteModal] = useState(false)
+   const { visible: guideVisible, dismiss: dismissGuide } = useGuide('position')
 
    const dispatch = useDispatch()
    const update = useSelector((state: any) => state.positionUpdate)
@@ -160,6 +164,7 @@ export default function Index() {
 
    return (
       <View style={[Styles.p15, Styles.flex1, { backgroundColor: colors.background }]}>
+         <GuideOverlay visible={guideVisible} steps={GUIDE_POSITION} onDismiss={dismissGuide} />
          <View>
             <WrapTab>
                <ButtonTab