First draft of a doc for Tracing in networking#42830

Draft

samsp-msft wants to merge 3 commits intodotnet:mainfrom samsp-msft:samsp/network-tracing

+193-98

Commits on Oct 4, 2024

First draft of a doc for Tracing in networking
Sam Spencer
committed

Commits on Oct 7, 2024

Updated metrics page to be in sync
Sam Spencer
committed

Commits on Oct 8, 2024

Extended the Tracing docs to include details about the experimental spans from .NET 9.
Sam Spencer
committed