return dummy llm api handler which will raise exception if called (#1954)

skyvern/forge/sdk/api/llm/models.py

@@ -93,3 +93,16 @@ class LLMAPIHandler(Protocol):
         screenshots: list[bytes] | None = None,
         parameters: dict[str, Any] | None = None,
     ) -> Awaitable[dict[str, Any]]: ...
+
+
+async def dummy_llm_api_handler(
+    prompt: str,
+    prompt_name: str,
+    step: Step | None = None,
+    task_v2: TaskV2 | None = None,
+    thought: Thought | None = None,
+    ai_suggestion: AISuggestion | None = None,
+    screenshots: list[bytes] | None = None,
+    parameters: dict[str, Any] | None = None,
+) -> dict[str, Any]:
+    raise NotImplementedError("Your LLM provider is not configured. Please configure it in the .env file.")