Add OpenXR-backed VR scene composition and XR controller input

[halx99]

Tested Device and RHIs

Windows: D3D11, D3D12, Vulkan with DP E4 PCVR device

Describe your changes

• Added optional OpenXR support behind AX_ENABLE_OPENXR, gated by AX_ENABLE_VR and disabled by default.
• Added the Khronos OpenXR-SDK dependency (release-1.1.60) to the 1kiss dependency profile and third-party CMake integration.
• Introduced OpenXRDriver, a long-lived runtime backend that owns OpenXR instance, system, session, local space, stereo swapchains, frame timing, action sets, interaction profiles, and controller state.
• Added VRSceneCompositor, the product VR rendering path backed by OpenXR. It polls XR frame/input state before scheduler update, renders each eye into the runtime swapchain, draws controller rays, submits projection layers, and falls back to normal rendering when the XR session is unavailable.
• Replaced the old SceneRenderer abstraction with SceneCompositor, now owned by RenderViewCore. Custom scene composition is installed with RenderViewCore::setSceneCompositor().
• Replaced VRGenericRenderer with VRPreviewSceneCompositor for non-runtime stereo preview and debugging. The preview path keeps side-by-side rendering, distortion meshes, head tracking, render scale, vignette, and VR scissor remapping.
• Added XR input events through XRInputEvent and XRInputEventListener, covering controller buttons, thumbstick axes, aim poses, grip poses, hand, phase, value, and interaction profile data.
• Extended pointer input with PointerType::Controller, optional 3D rays, previous rays, and PointerHitResult, allowing XR controller rays to drive existing pointer-based UI and scene interactions.
• Added VR pointer dispatch helpers to InputSystem, including controller pointer down/move/up/scroll and XR input event dispatch.
• Updated EventDispatcher to route XR input listeners and store pointer hit results during scene-graph hit testing and pointer capture dispatch.
• Made Node::onPointerHitTest() public and ray-aware, so custom 2D/3D nodes can participate in controller-ray picking.
• Updated Widget, ScrollView, GUI scroll views, menus, and terrain picking to support controller rays, hit results, clipping, scroll gestures, and captured pointer streams in VR.
• Added terrain ray-hit regression coverage and updated cpp-tests to use pointer hit results instead of manually reconstructing terrain rays.
• Added asymmetric perspective projection support with Mat4::createPerspectiveOffCenter(), used for per-eye OpenXR frusta.
• Generalized RenderTexturePass so it can target an RHI RenderTarget directly, disable camera override for advanced compositors, and use stable begin/clear/end ordering.
• Added renderer/RHI support for external runtime-owned textures via ExternalTextureDesc and DriverBase::createTextureFromNativeHandle().
• Added RenderContext::submitCurrentFrameCommands() and Renderer::submitCurrentFrameCommands() so external runtimes can receive completed rendering work before swapchain release.
• Added backend support needed by OpenXR swapchains across D3D11, D3D12, Vulkan, OpenGL ES, and shared RHI texture wrapping paths.
• Added a VulkanInterop abstraction layer. OpenXRVulkanInterop implements the interface and is registered via Application::registerVulkanInterop(). GraphicsCore queries runtime-required Vulkan instance/device extensions and the runtime-selected physical device through this interface, keeping the core RHI free of OpenXR dependencies.
• Added backend-specific OpenXR graphics bindings for D3D11, D3D12, Vulkan, and Android OpenGL ES. Desktop OpenGL and Windows ANGLE GLES are explicitly treated as unsupported OpenXR graphics backends.
• Moved scene event polling into the active compositor path so OpenXR frame timing and input are synchronized before game logic updates.
• Added a VR mode indicator when an active VR compositor is presenting.
• Renamed DriverContext to GraphicsCore.
• Updated C++ and Lua templates and VR cpp-tests to use VRPreviewSceneCompositor or VRSceneCompositor instead of VRGenericRenderer.
• Updated Lua bindings for new base, RHI, and UI APIs.

Issue ticket number and link

Checklist before requesting a review

For each PR

• Add Copyright if it missed:
  - "Copyright (c) 2019-present Axmol Engine contributors (see AUTHORS.md)."

• I have performed a self-review of my code.

  Optional:

  • I have checked readme and add important infos to this PR.
  • I have added/adapted some tests too.

For core/new feature PR

• I have checked readme and add important infos to this PR.
• I have added thorough tests.

Axmol 3.x ------------------------------------------------------------

For each 3.x PR

• Check the '#include "axmol.h"' and replace it with the needed headers.

[halx99]

/clang-format

[halx99]

/clang-format

[halx99]

/clang-format

[halx99]

/clang-format

[halx99]

/clang-format

[halx99]

/clang-format

[halx99]

/clang-format

[halx99]

/clang-format

[halx99]

/clang-format

[halx99]

/clang-format

[halx99]

/clang-format

[halx99]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 86a86e064d

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[halx99]

/clang-format

[halx99]

/clang-format