[CHANGE] Updated ValidationResult to monad version

DotBased.AspNet.Authority/Models/Validation/ValidationResult.cs

@@ -1,21 +0,0 @@
-namespace DotBased.AspNet.Authority.Models.Validation;
-
-public class ValidationResult
-{
-    public ValidationResult(bool success, IEnumerable<ValidationError>? errors = null)
-    {
-        if (errors != null)
-        {
-            Errors = errors.ToList();
-        }
-        Success = success;
-    }
-    
-    public bool Success { get; }
-    public IReadOnlyList<ValidationError> Errors { get; } = [];
-
-    public static ValidationResult Failed(IEnumerable<ValidationError> errors) => new(false, errors);
-    public static ValidationResult Ok() => new(true);
-
-    public override string ToString() => Success ? "Success" : $"Failed ({Errors.Count} errors)";
-}