[Blueprints] Type Blueprint v2 WXR author maps

[adamziel]

What?

Fixes the Blueprint v2 WXR author-map declaration types.

RemoteUsername and LocalUsername were typed as the literal value 'string', which made authorsMap only accept that exact value. This changes both aliases to string so real usernames can be mapped.

Why?

Blueprint v2 WXR imports can map remote authors to local users. TypeScript consumers should be able to write real mappings such as:

authorsMap: {
  alice: 'admin',
  'bob@example.com': 'editor',
}

This is type-only. It does not change runtime behavior.

Testing

• npm exec nx run playground-blueprints:typecheck
• npm exec nx run playground-blueprints:lint
• npm exec nx run playground-blueprints:test:vite -- --testFiles=packages/playground/blueprints/src/tests/v2/blueprint-v2-declaration.spec.ts
• git diff --check

Part of #2592.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Updates Blueprint v2 WXR author-map TypeScript declarations to allow real (non-literal) username mappings, and adds a type-level test to prevent regressions.

Changes:

• Fix RemoteUsername / LocalUsername type aliases from the literal 'string' to string.
• Add a declaration/typecheck test covering arbitrary authorsMap keys/values for WXR imports.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/playground/blueprints/src/lib/v2/wep-1-blueprint-v2-schema/appendix-A-blueprint-v2-schema.ts	Corrects WXR author-map username aliases to be real strings.
packages/playground/blueprints/src/tests/v2/blueprint-v2-declaration.spec.ts	Adds a type regression test ensuring authorsMap accepts arbitrary usernames.

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