Added models for presentation layer with data annotations

SchengenVisaApi/ApplicationLayer/Services/Applicants/Models/Validation/NameModelValidator.cs

@@ -0,0 +1,26 @@
+using Domains;
+using FluentValidation;
+
+namespace ApplicationLayer.Services.Applicants.Models.Validation;
+
+public class NameModelValidator : AbstractValidator<NameModel>
+{
+    public NameModelValidator()
+    {
+        RuleFor(m => m.FirstName)
+            .NotEmpty()
+            .WithMessage("First Name can not be empty")
+            .MaximumLength(ConfigurationConstraints.NameLength)
+            .WithMessage($"First Name length must be less than {ConfigurationConstraints.NameLength}");
+
+        RuleFor(m => m.Surname)
+            .NotEmpty()
+            .WithMessage("Surname can not be empty")
+            .MaximumLength(ConfigurationConstraints.NameLength)
+            .WithMessage($"Surname length must be less than {ConfigurationConstraints.NameLength}");
+
+        RuleFor(m => m.Patronymic)
+            .MaximumLength(ConfigurationConstraints.NameLength)
+            .WithMessage($"Patronymic length must be less than {ConfigurationConstraints.NameLength}");
+    }
+}