WN: Move Code snippets into working project examples - SignalR - WebSockets - ActivitySource #34276
Description
Related to #34183
I moved this out separately to track just my work since the original was assigned to a group but only one person can be listed on the org tracking item.
Complete the following before .NET 9 GA for What's New:
What's new PR entries where I also moved the code to projects and linked back in. For each one the code sample was created inline by the dev team and I went back and created an ASP.NET project for it with working code, tested and linked the code back in.
PR #33318
Moved the original inline code from dev for What's New .NET 9 Prev 7 for the SignalR section to a project that was compiled and tested.
PR #33460
Moved the original inline code from dev for What's New .NET 9 RC1 for WebSockets Keep-Alive Timeout to a project.
PR #34183
Recreated both SignalR ActivitySource examples for both client and server into an app project and the linked back in.