Add v1.1.0 TypeScript examples for commercial verbs

[GsCommand]

Motivation

• Provide TypeScript authoring guidance for Protocol-Commercial v1.1.0 so implementers have the same per-verb TS example surface that Protocol-Commons exposes.
• Fill the parity gap introduced by v1.1.0 (v1.0.0 had TS examples but v1.1.0 lacked them) while keeping all shapes strictly aligned to the current commercial schemas.

Description

• Add self-contained TypeScript request and receipt example files for all five commercial verbs under examples/v1.1.0/commercial/<verb>/ts/, creating paired *.request.examples.ts and *.receipt.examples.ts files for authorize, checkout, purchase, ship, and verify (10 new files in total).
• Mirror the Protocol-Commons v1.1.0 pattern by providing small handwritten interface definitions plus exported valid and invalid example objects in each file so examples are copyable and readable.
• Ensure the TS shapes follow the canonical schema semantics (e.g. checkout.capture uses "immediate" | "if_authorized", purchase.payment_input models the current one-of options, ship service/status enums and commercial_ref types match the schema, and verify receipt/verifier semantics align to the current corrected enums).
• Update README.md to make the new ts/ example directories discoverable and note that examples/v1.1.0/commercial/<verb>/ts/ mirrors the Protocol-Commons TS guidance pattern.

Testing

• Ran TypeScript sanity check with npx tsc --noEmit --target ES2020 --module ESNext --moduleResolution node examples/v1.1.0/commercial/*/ts/*.ts and it completed with no errors.
• Ran example validation with npm run validate:examples which validated all current-line examples successfully.
• Validated release integrity with npm run validate:integrity (checksum scope validated) and regenerated checksums with npm run generate:checksums which wrote updated checksums.txt successfully.
• All automated validations completed successfully and the changes were committed as Add v1.1.0 commercial TypeScript examples.

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Codex Task