test(js2form): add regression test for nested table fields (issue #23)

[maxatwork]

Motivation

• Add a regression test for the nested table scenario described in issue js2form node walking not working #23 to prevent this behavior from regressing in future changes.

Description

• Added a test that reproduces the exact nested table/form structure (phone + nested #addressInfo table with address.* inputs) and asserts objectToForm populates all nested fields; the test is located at packages/js2form/test/js2form.test.ts.
• No production source changes were required because current code already handles the scenario; this change is test-only to lock in expected behavior.

Testing

• Ran npm run build:packages which completed successfully.
• Ran npm -w @form2js/js2form test and the suite passed (8 tests passed for packages/js2form).

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Codex Task

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Summary by cubic

Adds a regression test for nested table fields (issue #23) to ensure objectToForm correctly populates phone and address.* inputs inside a nested #addressInfo table. Test-only change; no production code updates.

^{Written for commit c29aaf4. Summary will update on new commits.}

[cubic-dev-ai]

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