Adds a MSI v2 Demo App (#5530)

* Adds a MSI v2 Demo App

Adds a demo app for MSI v2

* Update ManagedIdentity-mTLS-Demo.md

* Update Program.cs

* pr comments

Author: gladjohn

prototype/MsiV2DemoApp/MsiV2DemoApp.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Identity.Client" />
+    <PackageReference Include="Microsoft.Identity.Client.MtlsPop" />
+  </ItemGroup>
+
+</Project>