Add animation controller system, material assets and skeleton visualization

- .animctrl state machine asset (params/transitions/blend trees, 1D+2D
  directional blending) with Unity Animator-style editor panel: state
  list, transitions, params, directional pad preview driving live
  CrossFade on the selected entity
- Split animation evaluation out of SceneRenderer into
  AnimationSystem/AnimationEvaluator; skin palettes with rest-pose
  fallback and blend-weight epsilon filtering
- MaterialAsset (.material) with reload-safe preview tile pool
  (DropMaterial clears dirty refs before instance destruction)
- EditorGizmoPass skeleton wires + viewport joint overlay; camera
  projection rework (baked Vulkan Y-flip, ortho support)
- Editor/game build split via HELLOVULKAN_EDITOR option

CMakeLists.txt

@@ -76,6 +76,12 @@ add_subdirectory(Lib/yaml-cpp)
 # Vulkan
 find_package(Vulkan REQUIRED)
 
+# ---- editor/game 编译期分离（UE WITH_EDITOR / Unity UNITY_EDITOR 模式）----
+# ON（默认）：HELLO_EDITOR=1，材质球预览 tile 池 + App/editor 编辑器 UI 全量编译
+# OFF：game 构建——预览 pass/atlas/请求池、previewEnvSets、App/editor 源码
+#      整体不进编译产物（宏裁剪，非运行时判断）
+option(HELLOVULKAN_EDITOR "Build editor modules (material preview, inspector UI)" ON)
+
 
 if(MINGW)
     set(CMAKE_CXX_STANDARD_LIBRARIES "${CMAKE_CXX_STANDARD_LIBRARIES} -Wl,-Bdynamic -lucrt")