Add required import UIKit for build with Aztec via SPM to work

Author: mokagio

WooCommerce/Classes/Tools/ImageService/DefaultImageService.swift

@@ -1,6 +1,7 @@
 import Combine
 import Foundation
 import Kingfisher
+import UIKit
 
 private extension URL {
     var imageCacheKey: String {

WooCommerce/Classes/Tools/ImageService/KingfisherImageDownloader+ImageDownloadable.swift

@@ -1,5 +1,6 @@
 import Kingfisher
 import Combine
+import UIKit
 
 /// The `@retroactive` attribute is used to apply `ImageDownloadTask` conformance to `DownloadTask` from the Kingfisher module.
 /// At the same time, `ImageDownloadTask` conform to `Cancellable` part of Combine module,

WooCommerce/Classes/ViewRelated/Editor/AztecTextViewAttachmentHandler.swift

@@ -1,4 +1,5 @@
 import Aztec
+import UIKit
 
 /// Implements Aztec's `TextViewAttachmentDelegate` without media support.
 final class AztecTextViewAttachmentHandler: TextViewAttachmentDelegate {

WooCommerce/Classes/ViewRelated/Editor/FormatBar/AztecFormatBarFactory.swift

@@ -1,5 +1,6 @@
 import Aztec
 import Gridicons
+import UIKit
 import WordPressEditor
 
 /// Creates Aztec format bar & action handling coordinator for the format bar.

WooCommerce/Classes/ViewRelated/Editor/FormatBar/Command/Implementation/AztecHeaderFormatBarCommand.swift

@@ -1,4 +1,5 @@
 import Aztec
+import UIKit
 import WordPressEditor
 
 struct AztecHeaderFormatBarCommand: AztecFormatBarCommand {

WooCommerce/Classes/ViewRelated/Editor/FormatBar/Command/Implementation/AztecLinkFormatBarCommand.swift

@@ -1,4 +1,5 @@
 import Aztec
+import UIKit
 
 struct AztecLinkFormatBarCommand: AztecFormatBarCommand {
     let formattingIdentifier: FormattingIdentifier = .link

WooCommerce/Classes/ViewRelated/Editor/FormatBar/Command/Implementation/AztecUnorderedListFormatBarCommand.swift

@@ -1,4 +1,6 @@
 import Aztec
+import Foundation
+import UIKit
 import WordPressEditor
 
 struct AztecUnorderedListFormatBarCommand: AztecFormatBarCommand {

WooCommerce/Classes/ViewRelated/Editor/FormatBar/TextList+AztecFormatting.swift

@@ -1,5 +1,6 @@
 import Foundation
 import Aztec
+import UIKit
 
 // MARK: - TextList.Style
 //