chore: re-sync imports following (#3086)

Author: dangotbanned

narwhals/_plan/arrow/typing.py

@@ -23,7 +23,7 @@
     )
     from typing_extensions import TypeAlias
 
-    from narwhals.typing import NativeDataFrame, NativeSeries
+    from narwhals._native import NativeDataFrame, NativeSeries
 
     StringScalar: TypeAlias = "Scalar[StringType | LargeStringType]"
     IntegerType: TypeAlias = "Int8Type | Int16Type | Int32Type | Int64Type | Uint8Type | Uint16Type | Uint32Type | Uint64Type"

narwhals/_plan/typing.py

@@ -10,6 +10,7 @@
     from typing_extensions import TypeAlias
 
     from narwhals import dtypes
+    from narwhals._native import NativeDataFrame, NativeFrame, NativeSeries
     from narwhals._plan._expr_ir import ExprIR, NamedIR, SelectorIR
     from narwhals._plan._function import Function
     from narwhals._plan.dataframe import DataFrame
@@ -19,13 +20,7 @@
     from narwhals._plan.expressions.namespace import IRNamespace
     from narwhals._plan.expressions.ranges import RangeFunction
     from narwhals._plan.series import Series
-    from narwhals.typing import (
-        NativeDataFrame,
-        NativeFrame,
-        NativeSeries,
-        NonNestedDType,
-        NonNestedLiteral,
-    )
+    from narwhals.typing import NonNestedDType, NonNestedLiteral
 
 __all__ = [
     "ColumnNameOrSelector",