fix(npm): prefer binary version output

[cyq1017]

Fixes #2561.

Problem:

• The npm wrapper handled --version / -V before launching the installed binary.
• If the wrapper package metadata lagged behind a locally updated binary, codew -V could report an older version while the TUI showed the newer binary version.

Change:

• Run the installed binary for version flags when it is available.
• Keep the existing package metadata fallback when the binary cannot be resolved or spawned.
• Add wrapper tests for both paths.

Verification:

• node --test npm/codewhale/test/run.test.js
• node --test npm/codewhale/test/*.test.js
• node npm/codewhale/bin/codew.js --version
• scripts/release/check-versions.sh
• git diff --check

[gemini-code-assist]

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