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

Library/Sources/Services/FileService.swift

@@ -22,7 +22,7 @@ public struct FileService: FileServicing {
     
     // MARK: Functions
     
-    public func copyItem(from source: URL, to destination: URL) async throws (FileServiceError) {
+    public func copyFile(from source: URL, to destination: URL) async throws (FileServiceError) {
         guard try await isItemExists(at: source) else {
             throw FileServiceError.itemNotExists
         }
@@ -30,8 +30,16 @@ public struct FileService: FileServicing {
             throw FileServiceError.itemAlreadyExists
         }
         
+        var itemData: Data?
+
         do {
-            try fileManager.copyItem(at: source, to: destination)
+            itemData = try Data(contentsOf: source)
+        } catch {
+            throw FileServiceError.itemEmptyData
+        }
+        
+        do {
+            try itemData?.write(to: destination, options: .atomic)
         } catch {
             throw FileServiceError.itemNotCopied
         }