chore: tidy package verification script

[CooperSheroy]

Summary

• Tidy the package verification script by avoiding a stale hard-coded check count.
• Remove the unused Bun $ import.

Why

• The script has gained checks over time, so the fixed “17 checks” wording can drift again.
• Dropping the unused import keeps the maintenance script easier to scan.

Validation

• git diff --check
• node --check packages/cli/scripts/check-package.ts

Note

• Full bun run lint / bun run test were not run locally because Bun is not installed in this cron environment.

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