feat: add package-level common exports

Author: Leandro Damascena <[email protected]>

Author: leandrodamascena

src/aws_durable_execution_sdk_python/__init__.py

@@ -1 +1,34 @@
 """AWS Lambda Durable Executions Python SDK."""
+
+# Main context - used in every durable function
+# Helper decorators - commonly used for step functions
+from aws_durable_execution_sdk_python.context import (
+    DurableContext,
+    durable_step,
+    durable_with_child_context,
+)
+
+# Most common exceptions - users need to handle these exceptions
+from aws_durable_execution_sdk_python.exceptions import (
+    DurableExecutionsError,
+    InvocationError,
+    ValidationError,
+)
+
+# Core decorator - used in every durable function
+from aws_durable_execution_sdk_python.execution import durable_execution
+
+# Essential context types - passed to user functions
+from aws_durable_execution_sdk_python.types import BatchResult, StepContext
+
+__all__ = [
+    "BatchResult",
+    "DurableContext",
+    "DurableExecutionsError",
+    "InvocationError",
+    "StepContext",
+    "ValidationError",
+    "durable_execution",
+    "durable_step",
+    "durable_with_child_context",
+]