Phase 2: add minimal query builder and first select-query test in linked-js

[flyon]

Motivation

• Extract the Shape/SHACL query DSL into a standalone rebrand/linked-js package that does not depend on RDF model classes or React while preserving the ability to build the plain JS query objects.
• Provide a minimal, testable slice of functionality to validate that Shape.select(...) calls translate into the same select-path JS object format used by the larger project.

Description

• Added a minimal package skeleton under rebrand/linked-js including TypeScript configs, dual-output helper (scripts/dual-package.js), and Jest config for tests.
• Implemented a small shape metadata system and decorators with Shape, ShapeDefinition, PropertyShape, and linkedShape/literalProperty/objectProperty in src/shapes/* to register property shapes without RDF model types.
• Implemented a lightweight query builder (QueryBuilderObject, QueryShape, QueryValue, SelectQueryFactory) that proxifies a dummy shape instance to trace property accesses and produce a serializable SelectQuery object in src/queries/SelectQuery.ts.
• Replaced the placeholder test with src/tests/query-basic.test.ts which installs a dummy QueryCaptureStore as the shape queryParser, runs Person.select(p => p.name), captures the produced query object, and asserts on its structure and property-shape metadata.

Testing

• Compiled and ran the package build and tests with: cd rebrand/linked-js && node ../../node_modules/.bin/rimraf ./lib && node ../../node_modules/.bin/tsc -p tsconfig-cjs.json && node ../../node_modules/.bin/tsc -p tsconfig-esm.json && node ./scripts/dual-package.js && node ../../node_modules/.bin/jest --config jest.config.cjs.
• The Jest suite completed with the single new test passing: 1 passed, 1 total.

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Codex Task