fix: expose llm alias for patching

Author: amjith

CHANGELOG.md

@@ -11,6 +11,7 @@
 ### Internal
 
 - Clean up ty type-checking for optional sqlean/llm imports.
+- Add an llm module alias for test patching.
 
 ## 1.18.0 
 

litecli/packages/special/llm.py

@@ -29,6 +29,9 @@
 from .main import Verbosity, parse_special_command
 from .types import DBCursor
 
+# Alias for tests and patching.
+llm = llm_module
+
 LLM_IMPORTED = llm_module is not None
 
 cli: click.Command | None