Add frontend creation game (#13)

Reviewed-on: #13

src/GameIdeas/GameIdeas.Shared/Dto/CategoriesDto.cs

@@ -0,0 +1,10 @@
+namespace GameIdeas.Shared.Dto;
+
+public class CategoriesDto
+{
+    public IEnumerable<PlatformDto>? Platforms { get; set; }
+    public IEnumerable<PropertyDto>? Properties { get; set; }
+    public IEnumerable<TagDto>? Tags { get; set; }
+    public IEnumerable<DeveloperDto>? Developers { get; set; }
+    public IEnumerable<PublisherDto>? Publishers { get; set; }
+}