[bindings] fix signatures in pyi files

src/Mod/Assembly/App/AssemblyLink.pyi

@@ -1,3 +1,7 @@
+# SPDX-License: LGPL-2.1-or-later
+
+from __future__ import annotations
+
 from typing import Final
 
 from Base.Metadata import export

src/Mod/Assembly/App/AssemblyObject.pyi

@@ -1,3 +1,7 @@
+# SPDX-License: LGPL-2.1-or-later
+
+from __future__ import annotations
+
 from typing import Any, Final
 
 from Base.Metadata import constmethod, export

src/Mod/Assembly/App/BomGroup.pyi

@@ -1,3 +1,7 @@
+# SPDX-License: LGPL-2.1-or-later
+
+from __future__ import annotations
+
 from Base.Metadata import export
 
 from App.DocumentObjectGroup import DocumentObjectGroup

src/Mod/Assembly/App/BomObject.pyi

@@ -1,3 +1,7 @@
+# SPDX-License: LGPL-2.1-or-later
+
+from __future__ import annotations
+
 from Base.Metadata import export
 from Spreadsheet.Sheet import Sheet
 

src/Mod/Assembly/App/JointGroup.pyi

@@ -1,3 +1,7 @@
+# SPDX-License: LGPL-2.1-or-later
+
+from __future__ import annotations
+
 from Base.Metadata import export
 
 from App.DocumentObjectGroup import DocumentObjectGroup

src/Mod/Assembly/App/SimulationGroup.pyi

@@ -1,3 +1,7 @@
+# SPDX-License: LGPL-2.1-or-later
+
+from __future__ import annotations
+
 from Base.Metadata import export
 
 from App.DocumentObjectGroup import DocumentObjectGroup

src/Mod/Assembly/App/ViewGroup.pyi

@@ -1,3 +1,7 @@
+# SPDX-License: LGPL-2.1-or-later
+
+from __future__ import annotations
+
 from Base.Metadata import export
 
 from App.DocumentObjectGroup import DocumentObjectGroup