chore: import upstream snapshot with attribution

haystack/hooks/__init__.py

@@ -0,0 +1,26 @@
+# SPDX-FileCopyrightText: 2022-present deepset GmbH <info@deepset.ai>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import sys
+from typing import TYPE_CHECKING
+
+from lazy_imports import LazyImporter
+
+_import_structure = {
+    "protocol": ["Hook", "HookPoint", "BEFORE_LLM", "BEFORE_TOOL", "AFTER_TOOL", "ON_EXIT", "VALID_HOOK_POINTS"],
+    "from_function": ["FunctionHook", "hook"],
+}
+
+if TYPE_CHECKING:
+    from .from_function import FunctionHook as FunctionHook
+    from .from_function import hook as hook
+    from .protocol import AFTER_TOOL as AFTER_TOOL
+    from .protocol import BEFORE_LLM as BEFORE_LLM
+    from .protocol import BEFORE_TOOL as BEFORE_TOOL
+    from .protocol import ON_EXIT as ON_EXIT
+    from .protocol import VALID_HOOK_POINTS as VALID_HOOK_POINTS
+    from .protocol import Hook as Hook
+    from .protocol import HookPoint as HookPoint
+else:
+    sys.modules[__name__] = LazyImporter(name=__name__, module_file=__file__, import_structure=_import_structure)