Show intro line on first used prompt during app create

[amcaplan]

WHY are these changes introduced?

We shouldn't show Let’s get started by naming your app project. if we're not going to prompt them for a name.

WHAT is this pull request doing?

Before:

$ npm init @shopify/app --name somename

Welcome. Let’s get started by naming your app project. You can change it later.

?  Which template would you like to use?

>  (1) node
   (2) php
   (3) ruby
   (4) none (build an app with extensions only)

   Press ↑↓ arrows to select, enter to confirm.

After:

$ npm init @shopify/app --name somename

Welcome. Let’s get started by choosing a template for your app project.

?  Which template would you like to use?

>  (1) node
   (2) php
   (3) ruby
   (4) none (build an app with extensions only)

   Press ↑↓ arrows to select, enter to confirm.

How to test your changes?

dev create-app with and without --name

You can also run bin/ create-test-app.js for another example of why this is irritating.

Measuring impact

How do we know this change was effective? Please choose one:

• n/a - this doesn't need measurement, e.g. a linting rule or a bug-fix
• Existing analytics will cater for this addition
• PR includes analytics changes to measure impact

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've made sure that any changes to dev or deploy have been reflected in the internal flowchart.

[github-actions]

We detected some changes at either packages/*/src or packages/cli-kit/assets/cli-ruby/** and there are no updates in the .changeset.
If the changes are user-facing, run "pnpm changeset add" to track your changes and include them in the next release CHANGELOG.

[amcaplan]

This isn't strictly necessary, but good for preventing bugs in case we add more prompts (which hopefully we never will).

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	73.53% (-0.02% 🔻)	5385/7324
🟡	Branches	70.22% (-0.09% 🔻)	2547/3627
🟡	Functions	72.3% (-0.01% 🔻)	1394/1928
🟡	Lines	75.2% (-0.03% 🔻)	5121/6810

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / loader.ts	87.75% (-0.66% 🔻)	73.03% (-1.69% 🔻)	95% (-0.08% 🔻)	88.42% (-0.7% 🔻)
🟢	... / link.ts	97.5%	91.3% (-3.93% 🔻)	100%	97.5%
🟢	... / identifiers-extensions.ts	98.28%	87.88% (-3.03% 🔻)	100%	98.04% (-0.04% 🔻)
🟢	... / identifiers-functions.ts	95.45%	64.29% (-7.14% 🔻)	100%	100%

Test suite run success

1254 tests passing in 625 suites.

Report generated by 🧪jest coverage report action from 309393b