Extract all messages to a file

[pepicrft]

Reference

By @gonzaloriestra:

It would be useful to have separate file(s) to store all the messages used in the CLI, as we have in the CLI 2.0.

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[github-actions]

This issue seems inactive. If it's still relevant, please add a comment saying so. Otherwise, take no action.
→ If there's no activity within a week, then a bot will automatically close this.
Thanks for helping to improve Shopify's dev tooling and experience.