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/eas.json

@@ -0,0 +1,21 @@
+{
+	"cli": {
+		"version": ">= 18.0.1",
+		"appVersionSource": "remote"
+	},
+	"build": {
+		"development": {
+			"developmentClient": true,
+			"distribution": "internal"
+		},
+		"preview": {
+			"distribution": "internal"
+		},
+		"production": {
+			"autoIncrement": true
+		}
+	},
+	"submit": {
+		"production": {}
+	}
+}