add calc getting started to main app

apps/mobile/package.json

@@ -27,6 +27,7 @@
     "@dylankenneally/react-native-ssh-sftp": "^1.5.20",
     "@expo/vector-icons": "^15.0.2",
     "@fressh/assets": "workspace:*",
+    "@fressh/react-native-uniffi-russh": "workspace:*",
     "@react-native-picker/picker": "2.11.1",
     "@react-native-segmented-control/segmented-control": "2.5.7",
     "@react-navigation/bottom-tabs": "^7.4.0",

apps/mobile/src/app/index.tsx

@@ -13,7 +13,7 @@ import {
 	secretsManager,
 } from '../lib/secrets-manager';
 import { sshConnectionManager } from '../lib/ssh-connection-manager';
-
+import { result } from '../lib/test-uniffi-russh';
 const defaultValues: ConnectionDetails = {
 	host: 'test.rebex.net',
 	port: 22,
@@ -119,7 +119,9 @@ export default function Index() {
 			>
 				<View style={styles.header}>
 					<Text style={styles.appName}>fressh</Text>
-					<Text style={styles.appTagline}>A fast, friendly SSH client</Text>
+					<Text style={styles.appTagline}>
+						A fast, friendly SSH client {result}
+					</Text>
 				</View>
 				<View style={styles.card}>
 					<Text style={styles.title}>Connect to SSH Server</Text>

apps/mobile/src/lib/test-uniffi-russh.ts

@@ -0,0 +1,32 @@
+import {
+	Calculator,
+	type BinaryOperator,
+	SafeAddition,
+	type ComputationResult,
+} from '@fressh/react-native-uniffi-russh';
+
+const calculator = new Calculator();
+
+const addOp = new SafeAddition();
+
+class SafeMultiply implements BinaryOperator {
+	perform(lhs: bigint, rhs: bigint): bigint {
+		return lhs * rhs;
+	}
+}
+
+const multOp = new SafeMultiply();
+
+// bigints
+const three = 3n;
+const seven = 7n;
+
+// Perform the calculation, and to get an object
+// representing the computation result.
+const computation: ComputationResult = calculator
+	.calculate(addOp, three, three)
+	.calculateMore(multOp, seven)
+	.lastResult()!;
+
+// Unpack the bigint value into a string.
+export const result = computation.value.toString();