Onboarding 페이지 추가

SodaLive/Sources/Main/HomeView.swift

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+//
+//  HomeView.swift
+//  SodaLive
+//
+//  Created by klaus on 2023/08/09.
+//
+
+import SwiftUI
+
+struct HomeView: View {
+    var body: some View {
+        Text("Home View")
+    }
+}
+
+struct HomeView_Previews: PreviewProvider {
+    static var previews: some View {
+        HomeView()
+    }
+}

SodaLive/Sources/Main/MainView.swift

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+//
+//  MainView.swift
+//  SodaLive
+//
+//  Created by klaus on 2023/08/09.
+//
+
+import SwiftUI
+
+struct MainView: View {
+    
+    @AppStorage("token") private var token: String = UserDefaults.string(forKey: UserDefaultsKey.token)
+    @AppStorage("isViewedOnboardingView") private var isViewedOnboardingView: Bool = UserDefaults.bool(forKey: .isViewedOnboardingView)
+    
+    var body: some View {
+        if isViewedOnboardingView {
+            if token.count > 0 {
+                HomeView()
+            } else {
+                LoginView()
+            }
+        } else {
+            OnboardingView()
+        }
+    }
+}
+
+struct MainView_Previews: PreviewProvider {
+    static var previews: some View {
+        MainView()
+    }
+}