Expand command palette smoke coverage

[ConnorQi01]

Summary

Expand smoke coverage for React Native command palette entries added or refactored recently.

Proposed Changes

• Check visibility for Start Packager, Clean & Restart Packager, CocoaPods install, EAS Build, and Expo command entries.
• Add a small command palette close helper to avoid search state leaking between checks.
• Reuse the close helper in the network inspector smoke coverage loop.

Test Plan

• npm run build
• npm run compile-smoke-tests (blocked by existing adm-zip module resolution error in test/smoke/suites/vsixbuild.test.ts)

Closes #2641