Add push notifications

CHDataManagement/Notifications/WebNotification.swift

@@ -0,0 +1,19 @@
+
+struct WebNotification {
+
+    /// The title of the notification
+    /// - Note: Not supported on Safari for iOS
+    let title: String
+
+    /// The main content/message
+    let body: String
+
+    init(title: String, body: String) {
+        self.title = title
+        self.body = body
+    }
+}
+
+extension WebNotification: Codable {
+    
+}