Clean up messaging around unlinked storefronts when running CLI commands

[aswamy]

WHY are these changes introduced?

• Cleaning up Hydrogen CLI link command and messaging around linked storefront

WHAT is this pull request doing?

Changes:

• We will show a warning (not error) when you run a Hydrogen CLI command on a storefront that isn't linked to a storefront on Admin.
• If you don't have a storefront to link to on Admin, we will just ask you to create a storefront instead of displaying an option list of size 1.
• If you deleted a storefront on Admin, we will try to relink your storefront when running a Hydrogen CLI command.

HOW to test your changes?

• Checkout this repo and build it
  • npm ci
  • cd packages/cli && npm run build
  • If it doesn't build, you might also need to run npm run build inside the other packages
• Create a storefront using h2 init and link it
  • You can run this command by navigating to the packages/cli directory of the project

Testing deleted storefront && unlinked storefront banner

• Go to the directory of your newly created storefront
  • Edit the .shopify/project.json file so storefront: {}
• In hydrogen/packages/cli, run h2 deploy --path=<path-to-project>
  • It should prompt you to link a storefront using the warning severity
  • also try h2 env list, h2 env pull, h2 env push__unstable commands to see the banner

Testing no storefronts on Admin

• Ensure you have Hydrogen App installed on your shop, but no storefronts
• In hydrogen/packages/cli, run h2 init
  • Try to link a storefront
  • Instead of prompting you to select a storefront, it will assume you want to create the storefront and ask you its name

Post-merge steps

Checklist

• [x] I've read the Contributing Guidelines
• [x] I've considered possible cross-platform impacts (Mac, Linux, Windows)
• [x] I've added a changeset if this PR contains user-facing or noteworthy changes
• [x] I've added tests to cover my changes
• [x] I've added or updated the documentation

[shopify[bot]]

Oxygen deployed a preview of your cli-consistency-2 branch. Details:

Storefront	Status	Preview link	Deployment details	Last update (UTC)
subscriptions	✅ Successful (Logs)	Preview deployment	Inspect deployment	April 17, 2024 5:22 PM
custom-cart-method	✅ Successful (Logs)	Preview deployment	Inspect deployment	April 17, 2024 5:22 PM
third-party-queries-caching	✅ Successful (Logs)	Preview deployment	Inspect deployment	April 17, 2024 5:22 PM
optimistic-cart-ui	✅ Successful (Logs)	Preview deployment	Inspect deployment	April 17, 2024 5:22 PM
skeleton	✅ Successful (Logs)	Preview deployment	Inspect deployment	April 17, 2024 5:22 PM
vite	✅ Successful (Logs)	Preview deployment	Inspect deployment	April 17, 2024 5:22 PM

Learn more about Hydrogen's GitHub integration.

[aswamy]

Force push

• If you run h2 env push__unstable, h2 env pull, h2 env list, or h2 deploy, we will verify
  • you have linked your storefront on Admin
  • if the existing storefront you've connected still exists on Admin (or has been deleted)
• moved verify-linked-storefront into a separate file for consistency and so we can easily test it
  • other Hydrogen CLI commands will call this method to ensure we have linked a storefront
• As Fran recommended, linkStorefront now takes an optional list of storefronts so we don't have to fetch it 2x

[aswamy]

Force push

• Removing user-confirmation on h2 deploy when user selects a preview environment, user passes in preview env handle, or user provides --preview flag

[aswamy]

Force push

• Updated the "not linked" banner when running env push, env pull, env list, or deploy command without linking a storefront on Admin
• Remove the user-prompt to link a storefront if it isn't linked

[aswamy]

Force Push

• Rebased with main