(B) Add validation bases

Clinics.Backend/Domain/Shared/Validation/IValidationResult.cs

+namespace Domain.Shared.Validation;
+
+public interface IValidationResult
+{
+	public static readonly Error ValidationError = new("ValidationError", "القيم المدخلة غير صالحة");
+
+	#region Properties
+	Error[] Errors { get; }
+	#endregion
+}

Clinics.Backend/Domain/Shared/Validation/ValidationResult.cs

+namespace Domain.Shared.Validation;
+
+public class ValidationResult : Result, IValidationResult
+{
+    private ValidationResult(Error[] errors)
+    : base(false, IValidationResult.ValidationError) =>
+    Errors = errors;
+
+    public Error[] Errors { get; }
+
+    public static ValidationResult WithErrors(Error[] errors) => new(errors);
+}

Clinics.Backend/Domain/Shared/Validation/ValidationResultT.cs

+namespace Domain.Shared.Validation;
+
+public class ValidationResult<TValue> : Result<TValue>, IValidationResult
+{
+    private ValidationResult(Error[] errors)
+    : base(default, false, IValidationResult.ValidationError) =>
+    Errors = errors;
+
+    public Error[] Errors { get; }
+
+    public static ValidationResult<TValue> WithErrors(Error[] errors) => new(errors);
+}