Added custom swift plugin

Summary: Our very own SeaMammal plugin for iOS written in swift

Reviewed By: passy

Differential Revision: D15199381

fbshipit-source-id: 10b085c314328ff52ae3f5feef51f70d0ce12f1b

iOS/Tutorial/Tutorial/SeaMammalsPlugin.swift

@@ -0,0 +1,34 @@
+//
+//  MyFlipperPlugin.swift
+//  Tutorial
+//
+//  Created by Pritesh Nandgaonkar on 5/3/19.
+//  Copyright © 2019 Facebook. All rights reserved.
+//
+
+import Foundation
+import FlipperKit
+
+class SeaMammalsPlugin: NSObject, FlipperPlugin {
+  var connection: FlipperConnection? = nil
+  let mammals: [MarineMammal]
+  
+  init(_ marineMammals: [MarineMammal]) {
+      mammals = marineMammals
+  }
+  
+  func identifier() -> String! {
+    return "sea-mammals"
+  }
+  
+  func didConnect(_ connection: FlipperConnection!) {
+    self.connection = connection
+    for (index, mammal) in mammals.enumerated() {
+      connection.send("newRow", withParams: ["id": index, "title": mammal.name, "url": mammal.image.absoluteString])
+    }
+  }
+  
+  func didDisconnect() {
+    connection = nil;
+  }
+}