Add a sequence container in OAI

Add a sequence container in OAI. Includes for_each algorithm, doxygen
odcumentation, and test using ctest.

common/utils/ds/CMakeLists.txt

@@ -1,5 +1,10 @@
 add_library(ds OBJECT
             byte_array.c
+            seq_arr.c
 )
 
 target_include_directories(ds PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+
+if(ENABLE_TESTS)
+  add_subdirectory(tests)
+endif()