[iOS SDK] Tap to close keyboard (#27104)

- Fixes:
https://nabla-tech.slack.com/archives/C04ENMXR93J/p1685402302117649

## Summary

Keep the interactive dismiss, but add tap to close.

### Changelog

- Messaging UI: Users can tap any where on the conversation screen to
close the keyboard.

## Test plan



https://github.com/nabla/health/assets/2571118/fa824d4d-4da0-42e5-a250-40ab661545c3

CHANGELOG.md

@@ -10,6 +10,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Messaging UI: Users can tap any where on the conversation screen to close the keyboard.
+
 ### Fixed
 
 

Sources/NablaMessagingUI/Scenes/Conversation/UI/ConversationViewController.swift

@@ -180,6 +180,16 @@ final class ConversationViewController: UIViewController, ConversationViewContra
     // TODO: @tgy - Don't retain modules
     private lazy var imagePickerModule = ImagePickerModule(delegate: self)
 
+    private lazy var tapGesture: UIGestureRecognizer = {
+        let recognizer = UITapGestureRecognizer(target: self, action: #selector(tapGestureHandler))
+        recognizer.cancelsTouchesInView = false
+        return recognizer
+    }()
+
+    @objc private func tapGestureHandler() {
+        view.endEditing(true)
+    }
+
     private func initialize() {
         hidesBottomBarWhenPushed = true
 
@@ -191,6 +201,8 @@ final class ConversationViewController: UIViewController, ConversationViewContra
             ?? UINavigationBarAppearance()
         scrollEdgeAppearance.configureWithDefaultBackground()
         navigationItem.scrollEdgeAppearance = scrollEdgeAppearance
+
+        collectionView.addGestureRecognizer(tapGesture)
     }
 
     private func setUp() {