feat: add Expo React Native client scaffold

- Expo SDK 54 / React Native 0.81 with expo-router
- Tailscale devcontainer feature for direct device connectivity
- Dev proxy for React Native DevTools access over Tailscale
- EAS build configuration for development/preview/production
- Ona automation for Expo dev server

Co-authored-by: Ona <no-reply@ona.com>

apps/aris-client/src/app/(tabs)/index.tsx

@@ -0,0 +1,96 @@
+import { Image } from "expo-image"
+import { Link } from "expo-router"
+import { Platform, StyleSheet } from "react-native"
+
+import { HelloWave } from "@/components/hello-wave"
+import ParallaxScrollView from "@/components/parallax-scroll-view"
+import { ThemedText } from "@/components/themed-text"
+import { ThemedView } from "@/components/themed-view"
+
+export default function HomeScreen() {
+	return (
+		<ParallaxScrollView
+			headerBackgroundColor={{ light: "#A1CEDC", dark: "#1D3D47" }}
+			headerImage={
+				<Image source={require("@assets/images/partial-react-logo.png")} style={styles.reactLogo} />
+			}
+		>
+			<ThemedView style={styles.titleContainer}>
+				<ThemedText type="title">Welcome!</ThemedText>
+				<HelloWave />
+			</ThemedView>
+			<ThemedView style={styles.stepContainer}>
+				<ThemedText type="subtitle">Step 1: Try it</ThemedText>
+				<ThemedText>
+					Edit <ThemedText type="defaultSemiBold">app/(tabs)/index.tsx</ThemedText> to see changes.
+					Press{" "}
+					<ThemedText type="defaultSemiBold">
+						{Platform.select({
+							ios: "cmd + d",
+							android: "cmd + m",
+							web: "F12",
+						})}
+					</ThemedText>{" "}
+					to open developer tools.
+				</ThemedText>
+			</ThemedView>
+			<ThemedView style={styles.stepContainer}>
+				<Link href="/modal">
+					<Link.Trigger>
+						<ThemedText type="subtitle">Step 2: Explore</ThemedText>
+					</Link.Trigger>
+					<Link.Preview />
+					<Link.Menu>
+						<Link.MenuAction title="Action" icon="cube" onPress={() => alert("Action pressed")} />
+						<Link.MenuAction
+							title="Share"
+							icon="square.and.arrow.up"
+							onPress={() => alert("Share pressed")}
+						/>
+						<Link.Menu title="More" icon="ellipsis">
+							<Link.MenuAction
+								title="Delete"
+								icon="trash"
+								destructive
+								onPress={() => alert("Delete pressed")}
+							/>
+						</Link.Menu>
+					</Link.Menu>
+				</Link>
+
+				<ThemedText>
+					{`Tap the Explore tab to learn more about what's included in this starter app.`}
+				</ThemedText>
+			</ThemedView>
+			<ThemedView style={styles.stepContainer}>
+				<ThemedText type="subtitle">Step 3: Get a fresh start</ThemedText>
+				<ThemedText>
+					{`When you're ready, run `}
+					<ThemedText type="defaultSemiBold">npm run reset-project</ThemedText> to get a fresh{" "}
+					<ThemedText type="defaultSemiBold">app</ThemedText> directory. This will move the current{" "}
+					<ThemedText type="defaultSemiBold">app</ThemedText> to{" "}
+					<ThemedText type="defaultSemiBold">app-example</ThemedText>.
+				</ThemedText>
+			</ThemedView>
+		</ParallaxScrollView>
+	)
+}
+
+const styles = StyleSheet.create({
+	titleContainer: {
+		flexDirection: "row",
+		alignItems: "center",
+		gap: 8,
+	},
+	stepContainer: {
+		gap: 8,
+		marginBottom: 8,
+	},
+	reactLogo: {
+		height: 178,
+		width: 290,
+		bottom: 0,
+		left: 0,
+		position: "absolute",
+	},
+})