Refactor project structure and add initial files

aspire-sample/aspire-sample.AppHost/aspire-sample.AppHost.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <IsAspireHost>true</IsAspireHost>
+    <UserSecretsId>2838ffdc-fa56-476d-807a-bd92015274be</UserSecretsId>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\aspire-sample.ApiService\aspire-sample.ApiService.csproj" />
+    <ProjectReference Include="..\aspire-sample.Web\aspire-sample.Web.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Aspire.Hosting.AppHost" Version="8.2.0" />
+  </ItemGroup>
+
+</Project>