[Bug]: Interactive prompting does not work

### What happened?

According to https://github.com/google/zx/issues/99, zx should process stdin but it seems to be not working

### How it should work?

See demo. The expectation is that deno and zx scripts would work the same as bash script

### How to reproduce the bug?

`deno run` shebang. File: deno.ts. Doesn't work
```typescript
#!/usr/bin/env -S deno run -A
import "npm:zx@8.8.5/globals";

await $`cat`
```

`zx` shebang. File: zx.ts. Doesn't work
```typescript
#!/usr/bin/env zx

await $`cat`
```

plain bash. FIle: bash.sh. Works
```bash
#!/usr/bin/env bash

cat
```

See demo:

https://github.com/user-attachments/assets/f57c4bdd-1dc2-497e-bbe3-c3e9620a215d

### Version

8.8.5

### What's OS kind?

Mac

### What JS runtime is used?

Deno

### Runtime Version

deno 2.5.4 (stable, release, aarch64-apple-darwin) v8 14.0.365.5-rusty typescript 5.9.2

### Error stack / relevant log output

```shell

```

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct