Add default parameters to a config file created by the CLI

[olayway]

Can we change the default config.js being created to contain

Why not include commented example fields for quicker onboarding in the default configuration?

Originally posted by @romovpa in https://github.com/flowershow/flowershow/issues/398#issuecomment-1408471270

[rufuspollock]

This is a nice to have: also probably easier if config stuff is in typescript and aggregated (cf pliny approach).

Though if this is causing issues for install this warrants higher priority. (i was not clear exactly what issue was in #398 and how it related to config in the end).