Detection if it is an interactive session or not

Automatically detect if it is an interactive session room or not. If it's not interactive, never prompt the user.

This should enable piping the script directly to bash.

```bash
curl -fsSL https://raw.githubusercontent.com/SamEdwardes/sams-simple-installer/main/ssi | bash -s -- BurntSushi/ripgrep
```

Piping to bash was not working before because of how the standard was being directed.