Remove UIKit References for Cleaner Codebase (#228)

* Remove UIViewController extension

* Replace UIKit import with Foundation for streamlined functionality

Demo/Demo.xcodeproj/project.pbxproj

@@ -78,7 +78,6 @@
 		BECD84A227036DDB007CCAE4 /* Intent.swift in Sources */ = {isa = PBXBuildFile; fileRef = BECD84A127036DDB007CCAE4 /* Intent.swift */; };
 		BED042312710833F00C80954 /* CardType.swift in Sources */ = {isa = PBXBuildFile; fileRef = BED042302710833F00C80954 /* CardType.swift */; };
 		BED04233271084DF00C80954 /* CardFormatter.swift in Sources */ = {isa = PBXBuildFile; fileRef = BED04232271084DF00C80954 /* CardFormatter.swift */; };
-		BEDE304A275EA33500D275FD /* UIViewController+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = BEDE3049275EA33500D275FD /* UIViewController+Extension.swift */; };
 		CB1AC3B82982AAD70081AED6 /* CardPayments.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = CB1AC3B72982AAD70081AED6 /* CardPayments.framework */; };
 		CB1AC3B92982AAD70081AED6 /* CardPayments.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = CB1AC3B72982AAD70081AED6 /* CardPayments.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		CB1AC3BB2982BB130081AED6 /* PaymentButtons.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = CB1AC3BA2982BB130081AED6 /* PaymentButtons.framework */; };
@@ -206,7 +205,6 @@
 		BECD84A127036DDB007CCAE4 /* Intent.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Intent.swift; sourceTree = "<group>"; };
 		BED042302710833F00C80954 /* CardType.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CardType.swift; sourceTree = "<group>"; };
 		BED04232271084DF00C80954 /* CardFormatter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CardFormatter.swift; sourceTree = "<group>"; };
-		BEDE3049275EA33500D275FD /* UIViewController+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIViewController+Extension.swift"; sourceTree = "<group>"; };
 		CB1AC3B72982AAD70081AED6 /* CardPayments.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = CardPayments.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		CB1AC3BA2982BB130081AED6 /* PaymentButtons.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = PaymentButtons.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		CB1AC3BF2982C4030081AED6 /* PayPalWebPayments.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = PayPalWebPayments.framework; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -484,7 +482,6 @@
 		BEDE3048275EA31800D275FD /* Extensions */ = {
 			isa = PBXGroup;
 			children = (
-				BEDE3049275EA33500D275FD /* UIViewController+Extension.swift */,
 				CB9ED44B283FDA900081F4DE /* PaymentButtonEnums+Extension.swift */,
 				3BCCFE452A9D47AC00C5102F /* CardExtensions.swift */,
 			);
@@ -632,7 +629,6 @@
 				BE8117662B080202009867B9 /* PayPalWebStatusView.swift in Sources */,
 				3BA5700B2AA13C1C0081D14F /* CoreConfigManager.swift in Sources */,
 				80E4300C2AD82C8D003CA748 /* ShippingPreference.swift in Sources */,
-				BEDE304A275EA33500D275FD /* UIViewController+Extension.swift in Sources */,
 				80F33CE826F8DE29006811B1 /* DemoMerchantAPI.swift in Sources */,
 				80F33CEF26F8E7CC006811B1 /* CreateOrderParams.swift in Sources */,
 				BECD84A227036DDB007CCAE4 /* Intent.swift in Sources */,

Demo/Demo/ViewModels/CardVaultViewModel.swift

@@ -1,4 +1,4 @@
-import UIKit
+import Foundation
 import CardPayments
 import CorePayments
 

Demo/Demo/ViewModels/PayPalViewModel.swift

@@ -1,4 +1,4 @@
-import UIKit
+import Foundation
 import PayPalNativePayments
 import CorePayments