Building native BPF programs for Windows is hard

Documentation on what is needed and steps required to build an BPF program for Windows are incomplete.

Recommend creating a getting started doc with step by step instructions on how to go from BPF C code -> native .sys files.

Use the issue description as the starting point for defining the guide. Document the steps from BPF C code to native .sys files on Windows, including the required prerequisites and build process. Done means a newcomer can follow the instructions end to end and produce the expected native files.

Written by the indexing model from the issue text.