feat(app-clip): setting up initial app clip logic

AppClipExtension/AppClipExtension.entitlements

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>com.apple.developer.parent-application-identifiers</key>
+    <array>
+        <string>$(AppIdentifierPrefix)com.ideashower.ReadItLaterPro</string>
+    </array>
+</dict>
+</plist>

AppClipExtension/AppClipExtensionApp.swift

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+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import SwiftUI
+
+@main
+struct AppClipExtensionApp: App {
+    var body: some Scene {
+        WindowGroup {
+            ContentView()
+                .onContinueUserActivity(NSUserActivityTypeBrowsingWeb, perform: { userActivity in
+                    guard let url = userActivity.webpageURL else {
+                        // Figure out how to error out?
+                        return
+                    }
+                    // URL passed to the app clip
+                    // This could be any url from getpocket.com, pocket.co that is supported by our LinkRouter
+                    // TODO:
+                    //    At this point we should
+                    //      Open the native view for this content. (Syndication, Collection, or the Share/Read link)
+                    //          At the right moment, present the StoreKit get the app overlay.
+
+            })
+        }
+    }
+}

AppClipExtension/Assets.xcassets/AccentColor.colorset/Contents.json

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

AppClipExtension/Assets.xcassets/AppIcon.appiconset/Contents.json

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

AppClipExtension/Assets.xcassets/Contents.json

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

AppClipExtension/ContentView.swift

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+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import SwiftUI
+import StoreKit
+
+struct ContentView: View {
+    @State var presentingAppStoreOverlay = false
+
+    var body: some View {
+        VStack {
+            Image(systemName: "globe")
+                .imageScale(.large)
+                .foregroundStyle(.tint)
+            Text("Hello, world!")
+
+            // TODO: We should determine the logic to present this.
+            Text(verbatim: "App Store Overlay")
+                .hidden()
+                .appStoreOverlay(isPresented: $presentingAppStoreOverlay) {
+                    SKOverlay.AppClipConfiguration(position: .bottom)
+                }
+        }
+        .onAppear {
+            presentingAppStoreOverlay = true
+        }
+        .padding()
+    }
+}
+
+#Preview {
+    ContentView()
+}

AppClipExtension/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSAppClip</key>
+	<dict>
+		<key>NSAppClipRequestEphemeralUserNotification</key>
+		<false/>
+		<key>NSAppClipRequestLocationConfirmation</key>
+		<false/>
+	</dict>
+</dict>
+</plist>

AppClipExtension/Preview Content/Preview Assets.xcassets/Contents.json

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