Added Hero model in C# code

Author: Xenoage

Blazor/Model/Hero.cs

@@ -0,0 +1,6 @@
+namespace BlazorComponents.Model;
+
+/// <summary>
+/// See "interface Hero" from Angular project.
+/// </summary>
+public record Hero(int id, string name); 

Blazor/_Imports.razor

@@ -6,3 +6,4 @@
 @using Microsoft.JSInterop
 @using BlazorComponents
 @using BlazorComponents.Components
+@using BlazorComponents.Model