CMake: fix hdEmbree.dll deployment path -- copy to usd/ not exe root

plugInfo.json declares LibraryPath '../hdEmbree.dll', relative to usd/hdEmbree/,
so the DLL must live at usd/hdEmbree.dll. The previous POST_BUILD copied it to
the exe root, causing the module-not-found error at load time.

Fix: copy hdEmbree.dll into usd/ for POST_BUILD and install(). embree3.dll
stays in the exe root where Windows DLL search finds it as a dependency.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CMakeLists.txt

@@ -112,9 +112,11 @@ if(WIN32)
 
     if(OPENUSD_HAS_EMBREE)
         add_custom_command(TARGET UsdLayerManager POST_BUILD
+            # plugInfo.json has LibraryPath "../hdEmbree.dll" relative to usd/hdEmbree/,
+            # which resolves to usd/hdEmbree.dll — so the DLL must live in usd/, not exe root.
             COMMAND ${CMAKE_COMMAND} -E copy_if_different
                 "${HDEMBREE_DLL}"
-                "$<TARGET_FILE_DIR:UsdLayerManager>"
+                "$<TARGET_FILE_DIR:UsdLayerManager>/usd/hdEmbree.dll"
             COMMAND ${CMAKE_COMMAND} -E copy_directory
                 "${HDEMBREE_PLUGIN_DIR}"
                 "$<TARGET_FILE_DIR:UsdLayerManager>/usd/hdEmbree"
@@ -170,8 +172,9 @@ install(FILES ${OpenUSD_ROOT_DIR}/plugin/usd/hdStorm.dll
 )
 
 if(OPENUSD_HAS_EMBREE)
+    # Install to bin/usd/ so plugInfo.json's LibraryPath "../hdEmbree.dll" resolves correctly.
     install(FILES "${HDEMBREE_DLL}"
-        DESTINATION bin
+        DESTINATION bin/usd
         OPTIONAL
     )
     install(DIRECTORY "${HDEMBREE_PLUGIN_DIR}"