Add countries field to Home.razor; update project refs

In Home.razor, added a private field `countries` to store a
collection of countries and updated `OnInitializedAsync` to
initialize this field by fetching data from `CountryService`.
In CountryData.Sample.ConsoleProject.csproj, removed an
unnecessary project reference to simplify dependencies.

sample/CountryData.Sample.Blazor/Components/Pages/Home.razor

@@ -36,8 +36,14 @@ else
 }
 
 @code {
+    /// <summary>
+    /// A collection of countries to be displayed on the page.
+    /// </summary>
     private IEnumerable<Country>? countries;
 
+    /// <summary>
+    /// Initializes the component and loads the country data.
+    /// </summary>
     protected override async Task OnInitializedAsync()
     {
         countries = await CountryService.GetCountries();

sample/CountryData.Sample.Console/CountryData.Sample.ConsoleProject.csproj

@@ -9,7 +9,6 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\src\CountryData.Standard\CountryData.Standard.csproj" />
-    <ProjectReference Include="..\CountryData.Sample.MAUI\CountryData.Sample.MAUI\CountryData.Sample.MAUI.csproj" />
   </ItemGroup>
 
 </Project>