Function handle_with_piped_input 

pub async fn handle_with_piped_input(
    prompt: String,
    provider: Option<String>,
    model: Option<String>,
    system_prompt: Option<String>,
    max_tokens: Option<String>,
    temperature: Option<String>,
    _attachments: Vec<String>,
    _images: Vec<String>,
    _audio_files: Vec<String>,
    _tools: Option<String>,
    _vectordb: Option<String>,
    _use_search: Option<String>,
    stream: bool,
) -> Result<()>

Handle direct prompt with piped input