Add lcameraBuff Stage 2 plugin with YUV attach and unit tests.

Introduce params parsing, pixel/format decisions, capture layout, shared
YuvStimProducer per camera, and channel stimulus buffers with attach flow.

Co-authored-by: Cursor <cursoragent@cursor.com>

stimBuffApis/lcameraBuff/tests/CMakeLists.txt

@@ -0,0 +1,27 @@
+add_executable(lcameraBuff_unit_tests
+	lcameraBuffParams_tests.cpp
+	pixelAndColorFormatDecisions_tests.cpp
+	yuvLayoutClassification_tests.cpp
+)
+
+target_include_directories(lcameraBuff_unit_tests PRIVATE
+	${CMAKE_CURRENT_SOURCE_DIR}
+	${CMAKE_SOURCE_DIR}/stimBuffApis/lcameraBuff
+	${CMAKE_SOURCE_DIR}/commonLibs/lcameraDev
+	${CMAKE_SOURCE_DIR}/libspinscale/tests
+	${CMAKE_SOURCE_DIR}/tests/fixtures
+	${CMAKE_SOURCE_DIR}/include
+	${CMAKE_BINARY_DIR}/include
+)
+
+target_link_libraries(lcameraBuff_unit_tests
+	gtest_main
+	lcameraBuff
+	spinscale_test_support
+	${Boost_LIBRARIES}
+	${OPENCL_LIBRARIES}
+)
+
+add_dependencies(lcameraBuff_unit_tests gtest_main spinscale_test_support)
+
+add_test(NAME lcameraBuff_unit_tests COMMAND lcameraBuff_unit_tests)