Build XCEditor workspace viewport compose foundation

tests/UI/Editor/unit/CMakeLists.txt

@@ -18,6 +18,7 @@ set(EDITOR_UI_UNIT_TEST_SOURCES
     test_ui_editor_viewport_input_bridge.cpp
     test_ui_editor_viewport_shell.cpp
     test_ui_editor_viewport_slot.cpp
+    test_ui_editor_workspace_compose.cpp
     test_ui_editor_shortcut_manager.cpp
     test_ui_editor_workspace_controller.cpp
     test_ui_editor_workspace_layout_persistence.cpp