Add Blueprints for Adding Crash Context

[bobbyg603]

We received a request through the Unreal store for Blueprints that would allow developers to add additional data to their crash reports. This seems like a good idea.

Looks like we can start here:

https://dev.epicgames.com/documentation/en-us/unreal-engine/crash-reporting-in-unreal-engine#addcustomcontexttocrashreports

and expose these functions with Blueprints by following the example here:

https://dev.epicgames.com/documentation/en-us/unreal-engine/blueprint-function-libraries-in-unreal-engine