feat(srp): add render layer filtering to scene draw

- carry MeshRenderer renderLayer through scene extraction into VisibleRenderItem
- extend native and managed FilteringSettings with renderLayerMask support
- let RenderObjectsRendererFeature author layer-filtered object draws

engine/src/Scripting/Mono/MonoScriptRuntime.cpp

@@ -932,9 +932,9 @@ static_assert(
 struct ManagedFilteringSettingsData {
     int32_t renderQueueMin = std::numeric_limits<int32_t>::lowest();
     int32_t renderQueueMax = std::numeric_limits<int32_t>::max();
+    uint32_t renderLayerMask = std::numeric_limits<uint32_t>::max();
     uint8_t requireShadowCasting = 0u;
     uint8_t requireRenderObjectId = 0u;
-    uint8_t padding[2] = {};
 };
 
 static_assert(