Pass options object to `Spinner.runCommand`

[codespool]

This fix: https://github.com/AstarNetwork/swanky-cli/issues/24 has caused some undesired behaviour (init command exits if yarn install fails, and doesn't create config file), so an additional param shouldExitOnError was added.

Since there are a lot of optional params, it makes sense to put those together into a single options param.