.Net: Process Runtime POC

[crickman]

Motivation and Context

.NET POC for integrating Agent Runtime with Processes.

Corresponds with Python POC: moonbox3#2

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄