Refactor LLM class export: update import statement and define public API

_llm/__init__.py

@@ -1,7 +1,7 @@
-# """
-# llm_client: A Python package for interacting with LLM models through Ollama.
-# """
+# ...existing code...
+# Export the LLM class so "from _llm import LLM" works.
+from .llm import LLM  # re-export the class from the module
 
-# from ._llm.llm import LLM  # Use relative import with dot prefix
-
-# __all__ = ["LLM"]
+# Define public API
+__all__ = ["LLM"]
+# ...existing code...