feat(srp): add descriptor-driven object draw authoring

- bridge renderer list descriptors into ScriptableRenderContext scene draw calls
- reuse DrawObjectsPass across Universal and project custom renderers
- add RenderObjectsRendererFeature for package-level object draw extension

project/Assets/Scripts/ProjectRenderPipelineProbe.cs

@@ -119,33 +119,44 @@ namespace ProjectScripts
         }
     }
 
-    public sealed class ProjectCustomOpaquePass
-        : ScriptableRenderPass
+    public sealed class ProjectRenderObjectsFeaturePipelineAsset
+        : UniversalRenderPipelineAsset
     {
-        public ProjectCustomOpaquePass()
+        public ProjectRenderObjectsFeaturePipelineAsset()
         {
-            renderPassEvent =
-                RenderPassEvent.RenderOpaques;
-        }
-
-        protected override bool RecordRenderGraph(
-            ScriptableRenderContext context,
-            RenderingData renderingData)
-        {
-            return context != null &&
-                   renderingData != null &&
-                   renderingData.isMainSceneStage &&
-                   context.DrawRenderers(
-                       SceneRenderPhase.Opaque,
-                       RendererListType.Opaque);
+            rendererDataList = new ScriptableRendererData[]
+            {
+                new UniversalRendererData
+                {
+                    renderOpaque = false,
+                    renderSkybox = false,
+                    renderTransparent = false,
+                    rendererFeatures = new ScriptableRendererFeature[]
+                    {
+                        new RenderObjectsRendererFeature
+                        {
+                            passEvent =
+                                RenderPassEvent.RenderOpaques,
+                            scenePhase =
+                                SceneRenderPhase.Opaque,
+                            rendererListType =
+                                RendererListType.Opaque
+                        }
+                    }
+                }
+            };
         }
     }
 
     public sealed class ProjectCustomRenderer
         : ScriptableRenderer
     {
-        private readonly ProjectCustomOpaquePass m_opaquePass =
-            new ProjectCustomOpaquePass();
+        private readonly DrawObjectsPass m_opaquePass =
+            new DrawObjectsPass(
+                RenderPassEvent.RenderOpaques,
+                SceneRenderPhase.Opaque,
+                RendererListDesc.CreateDefault(
+                    RendererListType.Opaque));
 
         protected override void AddRenderPasses(
             RenderingData renderingData)