include: Add windows.storage.idl.

include/Makefile.in

@@ -842,6 +842,7 @@ SOURCES = \
 	windows.perception.spatial.surfaces.idl \
 	windows.security.credentials.idl \
 	windows.security.cryptography.idl \
+	windows.storage.idl \
 	windows.storage.streams.idl \
 	windows.system.idl \
 	windows.system.power.idl \

include/windows.storage.idl

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2023 Hans Leidekker for CodeWeavers
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifdef __WIDL__
+#pragma winrt ns_prefix
+#endif
+
+import "windows.foundation.idl";
+
+namespace Windows.Storage {
+    interface IStorageFolder;
+    interface IStorageFolderStatics;
+
+    runtimeclass StorageFolder;
+
+    [
+        contract(Windows.Foundation.UniversalApiContract, 1.0),
+        static(Windows.Storage.IStorageFolderStatics, Windows.Foundation.UniversalApiContract, 1.0)
+    ]
+    runtimeclass StorageFolder
+    {
+        [default] interface Windows.Storage.IStorageFolder;
+    }
+}