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/CMakeLists.txt

@@ -0,0 +1,54 @@
+cmake_dependent_option(ENABLE_STIMBUFFAPI_lcameraBuff
+	"Enable libcamera YUV stim buff API" ON
+	"ENABLE_LIB_lcameraDev" OFF)
+
+if(ENABLE_STIMBUFFAPI_lcameraBuff)
+	set(CONFIG_STIMBUFFAPI_LCAMERABUFF_ENABLED 1)
+
+	pkg_check_modules(LIBCAMERA REQUIRED libcamera)
+
+	add_library(lcameraBuff SHARED
+		lcameraBuff.cpp
+		lcameraBuffParams.cpp
+		pixelAndColorFormatDecisions.cpp
+		yuvCaptureLayout.cpp
+		yuvChannelStimulusBuffer.cpp
+		yuvStimProducer.cpp
+	)
+
+	set_target_properties(lcameraBuff PROPERTIES
+		VERSION ${PROJECT_VERSION}
+		SOVERSION ${PROJECT_VERSION_MAJOR}
+	)
+
+	target_include_directories(lcameraBuff PUBLIC
+		${Boost_INCLUDE_DIRS}
+		${CMAKE_SOURCE_DIR}/include
+		${CMAKE_SOURCE_DIR}/smocore/include
+		${CMAKE_CURRENT_SOURCE_DIR}
+		${CMAKE_SOURCE_DIR}/commonLibs
+		${CMAKE_SOURCE_DIR}/commonLibs/lcameraDev
+		${LIBCAMERA_INCLUDE_DIRS}
+	)
+
+	target_link_libraries(lcameraBuff PUBLIC
+		Boost::system
+		Boost::log
+		attachmentSupport
+		spinscale
+	)
+
+	add_custom_command(TARGET lcameraBuff POST_BUILD
+		COMMAND ${CMAKE_COMMAND} -DVERIFY_FILE="$<TARGET_FILE:lcameraBuff>"
+			-P ${CMAKE_SOURCE_DIR}/cmake/VerifyBoostDynamic.cmake
+		COMMENT "Verifying Boost dynamic dependencies for lcameraBuff"
+	)
+
+	install(TARGETS lcameraBuff
+		LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} NAMELINK_SKIP
+	)
+
+	if(ENABLE_TESTS)
+		add_subdirectory(tests)
+	endif()
+endif()