PROTO: Add --json to store commands

[dmerand]

What

Add explicit --json support across the shopify store * command surface in this stack:

• shopify store auth
• shopify store auth info
• shopify store auth logout
• shopify store execute

This also pushes the store-command internals toward an object-first shape, so services produce structured results and text rendering is derived from those results.

Why

These commands are intended to be agent-first surfaces, but their JSON behavior was inconsistent:

• store auth was text-only
• store auth logout was text-only
• store execute printed JSON-ish results but did not expose an explicit --json contract
• auth-related state was being rebuilt in multiple places

This change makes the machine-readable contract explicit while keeping the human output intact.

How

• Add --json to store auth, store auth logout, and store execute
• Keep store auth info on the same structured auth-state model as store auth
• Extract shared auth-state building into packages/cli/src/cli/services/store/auth-state.ts
• Refactor store auth so auth succeeds with a structured result and the presenter decides whether to render text or JSON
• Keep store execute execution separate from final output, so the command writes/renders the returned result instead of mixing fetch and presentation in one service
• Normalize store lookup inside getStoreAuthInfo(...) so the service seam is defensive even outside command parsing

Testing

Manual checks:

shopify store auth --store donaldmerand.myshopify.com --scopes read_products --json
shopify store auth info --store donaldmerand.myshopify.com --json
shopify store execute --store donaldmerand.myshopify.com --query "query { shop { name id } }" --json
shopify store execute --store donaldmerand.myshopify.com --query "query { shop { name id } }" --output-file /tmp/store-result.json --json
shopify store auth logout --store donaldmerand.myshopify.com --json

Things to verify:

• store auth --json prints the final auth object to stdout without interleaving browser/progress text
• store auth info --json and store auth logout --json return structured objects
• store execute --json returns only the GraphQL result
• store execute --output-file ... --json writes the result file without printing the human success banner
• text mode for the same commands still renders the existing human-oriented output

Considered

• Leaving store execute as implicitly JSON-like without an explicit flag
• Keeping store execute execution and final output coupled in one service
• Deferring the shared auth-state model and rebuilding auth output objects separately in each command

Post-release steps

None.

Measuring impact

• 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

[dmerand]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• PROTO: Add --json to store commands #7186 👈 (View in Graphite)
• PROTO: Add shopify store logout #7185
• PROTO: Add store auth info command #7184
• Make store auth scopes additive #7172 : 1 other dependent PR (#7187 )
• main

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