Allow eBPF programs to queue workitems

I believe eBPF could be useful for thinks like file system filters. But an important missing feature would be the ability to queue workitems for async processing. This is needed for processing IO operations.

The issue names no files, tests, or entry points. Start by locating how eBPF programs execute on Windows and how file-system or I/O processing is represented, then determine the required work-item and asynchronous-processing behavior. Done would require an agreed design and implementation criteria for safely queuing and processing this work.

Written by the indexing model from the issue text.