Add an optional parameter to triggerReport and getReport so an
Error object can be passed. If it is passed the error message
and stack trace it contains will be added to the node-report
output in a new "JavaScript Exception Details" section.

This makes node-report more useful in custom error handlers as
it will include the stack trace of the original error as well
as the stack trace where the error was handled.

Update the API docs for getReport and triggerReport.
Fix crash when error object does not include a stack trace.

- Correct spelling in comments
- Update documentation comment for TriggerNodeReport
- v8::MaybeLocal<v8::Value> -> MaybeLocal<Value>