chore(live-test): point missing-CLI hint at pnpm exec vp

[altaywtf]

Summary

Running node live-test/run-live-test.ts without a packed CLI now tells you to run pnpm exec vp run build, which works from a fresh checkout. The old hint said vp run build, but vp is the pinned vite-plus devDependency and isn't on PATH, so following it failed with command not found.

• Only the hint text changes; the live:test:* package scripts already build before running the harness.
• live-test/ is not in the npm package, so this is a non-release chore.

Verification

• Fresh worktree without dist/ or global vp: before the fix, running the hinted command exits 127 and builds nothing; after it, the hinted command produces dist/taizn.mjs.
• pnpm exec vp run verify passes (128 tests).

Notes

Live Tizen scripts were not run.

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Written by an agent (Claude Code, Opus 5.5)

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