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

Library/Sources/Protocols/FileServicing.swift

@@ -8,7 +8,7 @@ public protocol 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)
     func createFolder(at location: URL) async throws (FileServiceError)
     func deleteItem(at location: URL) async throws (FileServiceError)
     func isItemExists(at location: URL) async throws (FileServiceError) -> Bool
@@ -19,8 +19,9 @@ public protocol FileServicing {
 
 public enum FileServiceError: Error, Equatable {
     case folderNotCreated
-    case itemNotCopied
     case itemAlreadyExists
+    case itemEmptyData
+    case itemNotCopied
     case itemNotDeleted
     case itemNotExists
     case itemNotFileURL