.Net: Processes - Cloud Events supporting components for emitting events + MicrosoftGraph emit Demo

Adding components to allow "forwarding" internal events externally and allow a way to subscribe to them outside the SK Process.

Includes:

Piped EventName in ProcessStepEdgeBuilder
Piped SourceEventName and EventId into KernelProcessEdge and ProcessMessage
Adding "EmitMessageExternally" in LocalProcess
New components KernelProcessEventsSubscriber and KernelProcessEventsSubscriberInfo(passed to KernelProcess)
Demo including 2 ways of emitting cloud events: using steps and using KernelProcessEventsSubscriber approach -> More details in dotnet/samples/Demos/PorcessWithCloudEvents/README.md

Fixes #9722 Fixes #9721

[ ] 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 :smile:

microsoft / semantic-kernel