Batch mode

[alem0lars]

Implement batch mode, where no questions are asked to the user but they must be provided instead from an environment variable.

The feature will be available through the argument:

• Name: --no-ask
• Type: boolean

A possible implementation is to define the expected input and when something is asked, fetch the answer from the environment variable (containing the JSON of the answers).
If the answer isn't available, raise an error.

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