add samples cpm file

Author: nytian

samples/Directory.Packages.props

@@ -0,0 +1,18 @@
+<Project>
+  <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Packages.props, $(MSBuildThisFileDirectory)..))" />
+  
+  <!-- Functions sample packages -->
+  <ItemGroup>
+    <PackageVersion Update="coverlet.collector" Version="6.0.0" />
+    <PackageVersion Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.0.13" />
+    <PackageVersion Include="Microsoft.Azure.Functions.Worker.Sdk" Version="1.16.2" />
+  </ItemGroup>
+
+  <!-- Durable sample packages -->
+  <ItemGroup>
+    <PackageVersion Include="Microsoft.DurableTask.Client.Grpc" Version="1.5.0" />
+    <PackageVersion Include="Microsoft.DurableTask.Generators" Version="1.0.0-preview.1" />
+    <PackageVersion Include="Microsoft.DurableTask.Worker.Grpc" Version="1.5.0" />
+  </ItemGroup>
+
+</Project>