Add validation and gateway creation

src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Components/GameValidation.cs

@@ -0,0 +1,25 @@
+using FluentValidation;
+using GameIdeas.Shared.Constants;
+using GameIdeas.Shared.Dto;
+
+namespace GameIdeas.BlazorApp.Pages.Games.Components;
+
+public class GameValidation : AbstractValidator<GameDto>
+{
+    public GameValidation()
+    {
+        RuleFor(g => g.Title)
+            .NotEmpty()
+            .NotNull()
+            .Matches(GlobalConstants.RegexName);
+
+        RuleFor(g => g.ReleaseDate)
+            .NotEmpty()
+            .NotNull();
+
+        RuleFor(g => g.Interest)
+            .NotNull()
+            .GreaterThanOrEqualTo(1)
+            .LessThanOrEqualTo(5);
+    }
+}