SpringBoot - add workflow and activity metadata to RegisteredInfo

[tsurdilo]

Added Workflow and Activity metadata to registered info Tested with sample https://github.com/temporalio/samples-java/pull/576

Now users can get a lot more info about registered workflows and activities:

@Quinn-With-Two-Ns sorry should have added this in the initial pr :) your suggestion to make it object type so we can add more data to it was awesome, allowed for this

[Quinn-With-Two-Ns]

Can we also add some basic tests for this? just verify a workflow registered returns the correct metadata?

[tsurdilo]

added test lets me know if ok to merge now