Add project data

Tabletop.Core/Validators/PlayerValidator.cs

@@ -0,0 +1,19 @@
+using FluentValidation;
+using Tabletop.Core.Models;
+
+namespace Tabletop.Core.Validators
+{
+    public class PlayerValidator : AbstractValidator<Player>
+    {
+        public PlayerValidator()
+        {
+            RuleFor(x => x.UsedForce)
+                .LessThanOrEqualTo(x => x.AllowedForce)
+                .WithMessage("Force points over limit");
+                        
+            RuleFor(x => x.Units)
+                .NotEmpty()
+                .WithMessage("At least one unit must be selected");
+        }
+    }
+}