Function create_test_llm_node 

pub fn create_test_llm_node(name: &str, prompt: &str) -> Node

Create a simple LLM node for testing

Example

use oxify_model::test_utils::create_test_llm_node;

let node = create_test_llm_node("test_node", "Test prompt");
assert_eq!(node.name, "test_node");