fix: add note for Swiftui projects to setup doc

Author: alanjcharles

src/connections/auto-instrumentation/setup.md

@@ -62,6 +62,19 @@ Follow these steps to integrate the Signals SDK into your Swift application:
 
 Verify that you replaced `<WRITE_KEY>` with the actual write key you copied in Step 1.
 
+> info "SwiftUI Projects"
+> If your app is written in SwiftUI, you will need to add a `TypeAlias.swift` file to your project in order to capture interaction and navigation Signals. Refer to the example below for more information
+
+```swift
+import Foundation
+import Signals
+
+typealias Button = SignalButton
+typealias NavigationStack = SignalNavigationStack
+typealias NavigationLink = SignalNavigationLink
+typealias TextField = SignalTextField
+typealias SecureField = SignalSecureField
+```
 ### Kotlin
 
 Follow these steps to integrate the Signals SDK into your Kotlin application: