Add VulkanHeaders

Vulkan header generator and xml spec from https://github.com/KhronosGroup/Vulkan-Docs commit: 49f1a381e2aec33ef32adf4a377b5a39ec016ec4

Author: VReaperV

libs/VulkanHeaders/apiconventions.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3 -i
+#
+# Copyright 2021-2026 The Khronos Group Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+# Generic alias for working group-specific API conventions interface.
+
+# This import should be changed at the repository / working group level to
+# specify the correct API's conventions.
+
+
+import os
+
+defaultAPI = 'vulkan'
+
+VulkanAPI = os.getenv('VULKAN_API', default=defaultAPI)
+
+if VulkanAPI == 'vulkansc':
+    from vkconventions import VulkanSCConventions as APIConventions
+elif VulkanAPI == 'vulkanbase':
+    from vkconventions import VulkanBaseConventions as APIConventions
+else:
+    from vkconventions import VulkanConventions as APIConventions