feat: add new endpoint for getting connection by out of band id
Description
Getting a connection by out of band if from invitation.
Related issues
Testing
Checklist
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I have updated the documentation (if necessary) -
I have added unit tests for new functionality (if applicable) -
My code follows the style guidelines of this project -
I have tested this code on my local machine before submitting this MR
Reviewers
Additional Notes
Closes #64 (closed)