feat: add deploy project authoring APIs

[artiphishle]

Summary

Completes DEP-12 Phase 1 by exposing the missing canonical project authoring APIs required before Studio can consume Deploy as its sole deployment owner.

• add typed, canonical store-listing locale authoring
• add semantic/path-safe store asset write/remove APIs without exposing authored file layout to consumers
• add canonical monetization desired-state writes with existing parser normalization/validation
• add canonical prepared-release writes with existing release validation and revision recomputation
• intentionally export the new owner APIs from @ankhorage/deploy/project
• add behavior-focused round-trip, invalid-input, path-safety, cleanup, and public-export coverage
• add a minor Changeset

Architecture

This keeps DEP-12 owner-first: Studio will not write deploy/listing/*, deploy/assets/*, deploy/monetization/products.json, or deploy/release.json directly. All persisted desired state remains owned and validated by @ankhorage/deploy.

Closes the Phase 1 release gate of #36; DEP-12 remains open for the subsequent Studio consumer phases after this package is merged and released.