feat: ship run local to only ask for a param value if there's available value, including default

[eob]

Right now, the ship run local user must positively affirm each default value in configs.

This sets behavior to automatically use defaulted values, leaving the user with the -c config.json option to override defaults.

[eob]

@dkolas I think you initially added this feature.

Right now the CLI asks the user to input any ConfigTemplate field that is (1) empty, but (2) defaulted.

That means to run some things locally, you have to press every time you type ship run local

This PR isn't any more right.. it's just a proposed tradeoff: if there's a default value applied, and you're doing ship run local, then it just accepts the default value as The Value.

Were a user to want to override it, they would supply the -c params.json arg

What do you think?

[dkolas]

I'm indifferent on this one. It's for local debugging, so the dev presumably knows what they did and didn't add defaults for. If you feel like this way is more convenient, go for it!