[Bug] -`q` flag does not suppress `println` output

## 🐛 Bug Report

The `-q` flag only suppresses tracing logs and banners. It has no effect on the 100+ direct `println!()` calls in CLI commands.

For example, `leo -q run` still prints:
```
➡️  Output

 • 3u32
```

These come from unguarded `println!()` calls in the command implementations.

Related: #28084, #29051