Implemented the "copyFile(from: to: )" function for the FileService service in the library target.

Test/Sources/Helpers/Mocks/FileServiceMock.swift

@@ -51,14 +51,14 @@ extension FileServiceMock: FileServicing {
     
     // MARK: Functions
     
-    func copyItem(from source: URL, to destination: URL) async throws (FileServiceError) {
+    func copyFile(from source: URL, to destination: URL) async throws (FileServiceError) {
         guard let nextAction else { return }
         
         switch nextAction {
         case .error(let error):
             throw error
-        case let .copyItem(source, destination):
-            try await spy?.copyItem(from: source, to: destination)
+        case let .copyFile(source, destination):
+            try await spy?.copyFile(from: source, to: destination)
         default:
             break
         }
@@ -126,7 +126,7 @@ private extension FileServiceMock {
 
 extension FileServiceMock {
     enum Action {
-        case copyItem(URL, URL)
+        case copyFile(URL, URL)
         case createFolder(URL)
         case deleteItem(URL)
         case error(FileServiceError)