Key node 1: move main-window UI presentation onto the D3D12 render loop with native UI renderer, text system, and texture host.
Key node 2: wire frame timing/FPS display, window runtime, swapchain presentation, and native screenshot capture around the new path.
Key node 3: carry editor shell/workspace/viewport/panel interaction updates needed by the new renderer and detached window flow.
Key node 4: pump async resource loads and scene bridge follow-up needed for scene content visibility in new_editor.
- add standalone pass asset factories for camera frame stages\n- let managed pipeline assets declare stage pass asset keys\n- make universal renderer data explicitly own the builtin shadow caster stage
- add managed RenderStateBlock authoring types and wire them through DrawingSettings
- let RenderObjectsRendererFeature author depth and stencil overrides for scene draws
- apply scene draw render state overrides inside builtin forward pipeline and document the stage plan
- let DrawingSettings carry an optional shaderPassName across managed and native scene draw APIs
- allow RenderObjectsRendererFeature to author explicit ForwardLit or Unlit scene draws
- exercise the new scene draw pass selection seam in the project render pipeline probe
- add a managed DrawingSettings seam for scene draw authoring
- let builtin forward scene draws use an override material when provided
- wire DrawObjectsPass and RenderObjectsRendererFeature through the new settings
- carry MeshRenderer renderLayer through scene extraction into VisibleRenderItem
- extend native and managed FilteringSettings with renderLayerMask support
- let RenderObjectsRendererFeature author layer-filtered object draws
