`vp run` does not preserve shell semantics for package.json scripts

`vp run` currently executes `package.json` scripts without fully preserving the shell semantics provided by package managers. For example, given:

  ```json
  {
    "scripts": {
      "lint": "vp lint packages/*/src"
    }
  }
```

`pnpm lint` expands `packages/*/src`, while `vp run lint` passes it literally and fails with "No files found to lint."