Gather the CLI command modules into a commands sub-package

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tools/tests/test_export_llm_input.py

@@ -14,7 +14,8 @@ from unittest import mock
 
 from sqlalchemy.orm import Session
 
-from pop_fem_audit_tools import config, export_llm_input
+from pop_fem_audit_tools import config
+from pop_fem_audit_tools.commands import export_llm_input
 from pop_fem_audit_tools.database import Base, DataSource
 from pop_fem_audit_tools.models import (
     Artist,