Add typed JSON output to theme package

[gonzaloriestra]

WHY are these changes introduced?

theme package creates a ZIP file but has no machine-readable result or discoverable output schema.

Part of shop/issues-develop#23694.

WHAT is this pull request doing?

Return the ZIP path from packaging and present it as text or validated JSON. Keep the existing archive contents, filename rules, errors, and success message.

Normal output:

Your local theme was packaged in Dawn-1.0.zip

Matching JSON example:

{"path": "/themes/example/Dawn-1.0.zip"}

How to manually test your changes?

pnpm shopify theme package --path YOUR_THEME
pnpm shopify theme package --path YOUR_THEME --json
pnpm shopify theme package --json-schema

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've considered analytics changes to measure impact
• A single changeset for all theme migrations is added in the last PR, #8682.

[isaacroldan]

you don't need these special cases no? Just

vi.mock('@shopify/cli-kit/node/ui')
vi.mock('@shopify/cli-kit/node/analytics')

Should work fine

[gonzaloriestra]

Updated, thanks

[isaacroldan]

Minor comment on the tests

[github-actions]

Differences in type declarations

We detected differences in the type declarations generated by Typescript for this branch compared to the baseline ('main' branch). Please, review them to ensure they are backward-compatible. Here are some important things to keep in mind:

• Some seemingly private modules might be re-exported through public modules.
• If the branch is behind main you might see odd diffs, rebase main into this branch.

New type declarations

We found no new type declarations in this PR

Existing type declarations

packages/cli-kit/dist/public/node/base-command.d.ts

@@ -35,6 +35,7 @@ declare abstract class BaseCommand extends Command {
         argv: string[];
     }>;
     protected environmentsFilename(): string | undefined;
+    protected validateNonTTYFlags(flags: FlagOutput): void;
     protected failMissingNonTTYFlags(flags: FlagOutput, requiredFlags: string[]): void;
     private failMissingNonTTYFlagRequirements;
     private applicableNonTTYFlagRequirements;