Explicitly import Foundation, UIKit, and other required frameworks

When moving from frameworks to Swift packages, see for example
#15622 and
#15651, we lose the
framework headers which had statements like `#import
<Foundation/Foundation.h>`. This means that basic frameworks such as
Foundation and UIKit are no longer imported as part of consumers
frameworks such as Yosemite. To simplify the code review of the upcoming
PRs migrating those frameworks to Swift packages in `Modules/`, this PR
preemptively adds the required imports in the files that need them.

This was done by running `git reset trunk` on the workbench branch
`temp-branch-for-swiftpm-migration` and only committing the `import`
additions in this branch.

Author: mokagio

WooCommerce/Classes/Analytics/WooAnalyticsEvent.swift

@@ -1,4 +1,5 @@
 import Foundation
+import UIKit
 import Yosemite
 import WooFoundation
 

WooCommerce/Classes/Authentication/Epilogue/StorePickerViewModel.swift

@@ -1,5 +1,6 @@
 import Foundation
 import Experiments
+import UIKit
 import Yosemite
 import protocol Storage.StorageManagerType
 import protocol WooFoundation.Analytics

WooCommerce/Classes/Authentication/Jetpack Setup/Native Jetpack Setup/JetpackSetupViewModel.swift

@@ -1,4 +1,5 @@
 import Foundation
+import UIKit
 import Yosemite
 import enum Alamofire.AFError
 import enum Networking.NetworkError

WooCommerce/Classes/Authentication/Navigation Exceptions/NonAtomicSiteViewModel.swift

@@ -1,4 +1,5 @@
 import Foundation
+import UIKit
 import Yosemite
 
 /// Configuration and actions for an ULErrorViewController, modelling

WooCommerce/Classes/Authentication/PostSiteCredentialLoginChecker.swift

@@ -1,3 +1,4 @@
+import UIKit
 import Yosemite
 import protocol Networking.ApplicationPasswordUseCase
 import protocol WooFoundation.Analytics

WooCommerce/Classes/Blaze/BlazeLocalNotificationScheduler.swift

@@ -1,3 +1,5 @@
+import Foundation
+import UserNotifications
 import Yosemite
 import protocol Storage.StorageManagerType
 import Combine

WooCommerce/Classes/Extensions/Product+SwiftUIPreviewHelpers.swift

@@ -1,5 +1,6 @@
 #if canImport(SwiftUI) && DEBUG
 
+import Foundation
 import Yosemite
 
 extension Product {

WooCommerce/Classes/Extensions/ShippingLabel+Helpers.swift

@@ -1,3 +1,4 @@
+import Foundation
 import Yosemite
 
 extension ShippingLabel {

WooCommerce/Classes/GoogleAds/GoogleAdsCampaignCoordinator.swift

@@ -1,4 +1,5 @@
 import Foundation
+import UIKit
 import Yosemite
 import protocol WooFoundation.Analytics
 

WooCommerce/Classes/Model/APNSDevice+Woo.swift

@@ -1,4 +1,5 @@
 import Foundation
+import UIKit
 import Yosemite