Add dependency injection

ios/Native/Application/Shared/SharedState.swift

@@ -13,12 +13,12 @@ import ReactAppDependencyProvider
 
 final class SharedState: ObservableObject {
   var reactNativeFactory: RCTReactNativeFactory?
-  private let emitter = EventEmitter.sharedInstance
+  let container = DependencyContainer()
   
   // SwiftUI => RN => SwiftUI
   @Published var message: String = ""
   
-  func send(message: String) {
-    emitter.send(message: message)
+  init() {
+    container.register(EventEmitter.self) { _ in DefaultEventEmitter() }
   }
 }