Fix function generation in pnpm

[lopert]

Reimplementation of #6242

WHY are these changes introduced?

Fixes shop/issues-shopifyvm#434

WHAT is this pull request doing?

Adds "graphql-codegen/cli" dependency to CLI in order to call generate function instead of shelling out to npm exec.

How to test your changes?

1. Create shopify app (remix and extension-only)
2. dev cd cli && git checkout lopert.pnpm-install-fix
3. pnpm shopify app extension generate --path <path to app created in step 1>
4. Should see success message after generating any extension

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

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	79.02% (+0.04% 🔼)	13362/16910
🟡	Branches	72.71% (+0.05% 🔼)	6525/8974
🟡	Functions	79.22% (+0.02% 🔼)	3450/4355
🟡	Lines	79.38% (+0.04% 🔼)	12623/15902

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / fs.ts	87.83% (-0.41% 🔻)	92.31% (-2.69% 🔻)	85.42% (+0.63% 🔼)	88.29% (+0.29% 🔼)

Test suite run success

3256 tests passing in 1342 suites.

Report generated by 🧪jest coverage report action from 4f678d5

[isaacroldan]

/snapit

[github-actions]

🫰✨ Thanks @isaacroldan! Your snapshot has been published to npm.

Test the snapshot by installing your package globally:

npm i -g --@shopify:registry=https://registry.npmjs.org @shopify/cli@0.0.0-snapshot-20251014144216

Caution

After installing, validate the version by running just shopify in your terminal.
If the versions don't match, you might have multiple global instances installed.
Use which shopify to find out which one you are running and uninstall it.

[isaacroldan]

I'm getting this error when trying to generate a discount function:

(Using the snapshot I generated above)

Take into account that there are some graphql-codegen in devDependencies, so is safer to test using a snapshot

[github-actions]

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→ 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.

[lopert]

Went with a simpler approach to this: #6520