Fix internal CLI path

[jviotti]

Signed-off-by: Juan Cruz Viotti [email protected]

[augmentcode]

🤖 Augment PR Summary

Summary: Adjusts the VS Code extension to invoke the bundled @sourcemeta/jsonschema CLI from its correct npm/cli.js entrypoint so internal CLI execution works after upstream packaging changes.

Also adds a short description to the GeoJSON $ref test fixture schema for clarity while exercising remote reference resolution.

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[augmentcode]

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