refactor into modules

gdocs/managers/__init__.py

@@ -0,0 +1,18 @@
+"""
+Google Docs Operation Managers
+
+This package provides high-level manager classes for complex Google Docs operations,
+extracting business logic from the main tools module to improve maintainability.
+"""
+
+from .table_operation_manager import TableOperationManager
+from .header_footer_manager import HeaderFooterManager
+from .validation_manager import ValidationManager
+from .batch_operation_manager import BatchOperationManager
+
+__all__ = [
+    'TableOperationManager',
+    'HeaderFooterManager', 
+    'ValidationManager',
+    'BatchOperationManager'
+]