add face feature extraction pipeline

face_pipeline/CMakeLists.txt

@@ -0,0 +1,25 @@
+add_library(face_pipeline STATIC
+    src/motion_detector.cpp
+    src/face_detector.cpp
+    src/face_aligner.cpp
+    src/face_embedder.cpp
+    src/iou_tracker.cpp
+    src/result_sink.cpp
+    src/face_pipeline.cpp
+)
+
+target_include_directories(face_pipeline PUBLIC
+    ${CMAKE_CURRENT_SOURCE_DIR}/include
+)
+
+target_link_libraries(face_pipeline PUBLIC
+    facedetection
+    ${OpenCV_LIBS}
+    Threads::Threads
+)
+
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+    target_compile_options(face_pipeline PRIVATE -O3)
+elseif(MSVC)
+    target_compile_options(face_pipeline PRIVATE /O2)
+endif()