feat: SwiftUI widget 및 예제 추가

Examples/SwiftUI-Example/Assets.xcassets/AccentColor.colorset/Contents.json

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+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/SwiftUI-Example/Assets.xcassets/AppIcon.appiconset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/SwiftUI-Example/Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/SwiftUI-Example/Preview Content/Preview Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/SwiftUI-Example/SwiftUI_ExampleApp.swift

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+//
+//  SwiftUI_ExampleApp.swift
+//  SwiftUI-Example
+//
+//  Created by 김진규 on 2023/08/04.
+//  Copyright © 2023 TossPayments, Inc. All rights reserved.
+//
+
+import SwiftUI
+
+@main
+struct SwiftUI_ExampleApp: App {
+    var body: some Scene {
+        WindowGroup {
+            TossPaymentsContentView()
+        }
+    }
+}

Examples/SwiftUI-Example/TossPaymentsContentView.swift

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+//
+//  TossPaymentsContentView.swift
+//  SwiftUIExample
+//
+//  Created by 김진규 on 2022/09/27.
+//
+
+#if !os(macOS) && canImport(SwiftUI)
+import SwiftUI
+import TossPayments
+
+private enum Constants {
+    static let clientKey: String = "test_ck_P24xLea5zVAqkMGkoG7VQAMYNwW6"
+    static let 테스트결제정보: PaymentInfo = DefaultPaymentInfo(
+        amount: 1000,
+        orderId: "9lD0azJWxjBY0KOIumGzH",
+        orderName: "토스 티셔츠 외 2건",
+        customerName: "박토스"
+    )
+}
+
+struct TossPaymentsContentView: View {
+    @State private var showingSuccess: Bool = false
+    @State private var showingFail: Bool = false
+
+
+    @StateObject
+    var viewModel = TossPaymentsContentViewModel()
+
+    var body: some View {
+        ScrollView {
+            VStack(spacing: 0) {
+                PaymentMethodWidgetView(widget: viewModel.widget, amount: PaymentMethodWidget.Amount(value: 1000))
+                AgreementWidgetView(widget: viewModel.widget)
+            }
+        }
+        Button("결제하기") {
+            viewModel.requestPayment(info: DefaultWidgetPaymentInfo(orderId: "123", orderName: "김토스"))
+        }
+        .alert(isPresented: $showingSuccess, content: {
+            Alert(title: Text(verbatim: "Success"), message: Text(verbatim: viewModel.onSuccess?.orderId ?? ""))
+        })
+        .alert(isPresented: $showingFail, content: {
+            Alert(title: Text(verbatim: "Fail"), message: Text(verbatim: viewModel.onFail?.orderId ?? ""))
+        })
+        .onReceive(viewModel.$onSuccess.compactMap { $0 }) { success in
+            showingSuccess = true
+        }
+        .onReceive(viewModel.$onFail.compactMap { $0 }) { fail in
+            showingFail = true
+        }
+    }
+}
+
+struct TossPaymentsContentView_Previews: PreviewProvider {
+    static var previews: some View {
+        TossPaymentsContentView()
+    }
+}
+
+#endif

Examples/SwiftUI-Example/TossPaymentsContentViewModel.swift

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+//
+//  TossPaymentsContentViewModel.swift
+//  SwiftUI-Example
+//
+//  Created by 김진규 on 2023/08/04.
+//  Copyright © 2023 TossPayments, Inc. All rights reserved.
+//
+
+import SwiftUI
+import TossPayments
+
+private enum Constants {
+    static let clientKey: String = "test_ck_P24xLea5zVAqkMGkoG7VQAMYNwW6"
+    static let 테스트결제정보: PaymentInfo = DefaultPaymentInfo(
+        amount: 1000,
+        orderId: "9lD0azJWxjBY0KOIumGzH",
+        orderName: "토스 티셔츠 외 2건",
+        customerName: "박토스"
+    )
+}
+
+class TossPaymentsContentViewModel: ObservableObject {
+    let widget = PaymentWidget(clientKey: Constants.clientKey, customerKey: "Test")
+
+
+    @Published
+    var isShowing: Bool = false
+
+    @Published
+    var onSuccess: TossPaymentsResult.Success?
+    @Published
+    var onFail: TossPaymentsResult.Fail?
+
+    init() {
+        widget.delegate = self
+    }
+    func requestPayment(info: WidgetPaymentInfo) {
+        widget.requestPayment(
+            info: DefaultWidgetPaymentInfo(orderId: "123", orderName: "김토스")
+        )
+    }
+}
+
+extension TossPaymentsContentViewModel: TossPaymentsDelegate {
+    func handleSuccessResult(_ success: TossPaymentsResult.Success) {
+        onSuccess = success
+    }
+
+    func handleFailResult(_ fail: TossPaymentsResult.Fail) {
+        onFail = fail
+    }
+}