Change build to single file release

This achieves simpler distribution

src/SparseTransform.CLI/SparseTransform.CLI.csproj

@@ -13,6 +13,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <PublishSingleFile>true</PublishSingleFile>
   </PropertyGroup>
 
 </Project>