create msbuild task for neo express operations

[devhawk]

• https://natemcmaster.com/blog/2017/07/05/msbuild-task-in-nuget/
• https://blog.rsuter.com/implement-custom-msbuild-tasks-and-distribute-them-via-nuget/
• https://ithrowexceptions.com/2020/08/04/implementing-and-debugging-custom-msbuild-tasks.html

[devhawk]

Investigate batching multiple neo-express operations into a single execution for higher performance