[Testing] pretty print for cli output

[dhegberg]

Migration from aws/aws-durable-execution-sdk-python-testing#55

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overview

Add a pretty print output for viewing the results of an execution in a terminal.

eelated

• https://github.com/aws/aws-durable-execution-sdk-js/blob/development/packages/aws-durable-execution-sdk-js-testing/src/test-runner/local/result-formatter.ts#L75

acceptance criterua

1. pretty print of execution output available from the cli