Implemented the "delete(at: )" function for the FileService service in the module target.

Sources/Library/Protocols/FileServicing.swift

@@ -8,6 +8,7 @@ public protocol FileServicing {
     
     // MARK: Functions
     
+    func delete(at url: URL) async throws (FileServiceError)
     func exists(at url: URL) async throws (FileServiceError) -> Bool
     
 }
@@ -16,8 +17,8 @@ public protocol FileServicing {
 
 public enum FileServiceError: Error, Equatable {
     case folderNotCreated
-    case folderNotDeleted
     case urlAlreadyExists
+    case urlNotDeleted
     case urlNotExists
     case urlNotFileURL
 }