Make Status implement fmt.Stringer

[VoyTechnology]

Debugging is easier if Status implements fmt.Stringer.

[CLAassistant]

All committers have signed the CLA.

[akshayjshah]

Thanks for the PR, @VoyTechnology! This is generally a good idea.

Before we merge this, can you change the code to follow the casing convention we're using for connect.Code? The code is here. Please also handle unknown values the way they are in connect.Code, and add a simple unit test.

[VoyTechnology]

Hi @akshayjshah, I have updated the PR with your requested changes. Since there are fewer statuses than codes, I manually create a list of valid status codes to check against.

[akshayjshah]

Looks good to me! I added a bit of logic to the tests to use testing/quick to test more status constants, but the rest of the change is nice. Thank you for the contribution, @VoyTechnology!