tracing NS + category region component

- made library.cpp impl more broadly available
- support for perfetto args
- MPI wrappers encode args and return type
- new categories / perfetto categories
- omnitrace_library category -> libomnitrace
- omnitrace_dl_library -> libomnitrace-dl

source/lib/omnitrace/CMakeLists.txt

@@ -71,6 +71,7 @@ set(library_sources
     ${CMAKE_CURRENT_LIST_DIR}/library/thread_data.cpp
     ${CMAKE_CURRENT_LIST_DIR}/library/thread_sampler.cpp
     ${CMAKE_CURRENT_LIST_DIR}/library/timemory.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/library/tracing.cpp
     ${CMAKE_CURRENT_LIST_DIR}/library/components/backtrace.cpp
     ${CMAKE_CURRENT_LIST_DIR}/library/components/fork_gotcha.cpp
     ${CMAKE_CURRENT_LIST_DIR}/library/components/mpi_gotcha.cpp
@@ -101,9 +102,11 @@ set(library_headers
     ${CMAKE_CURRENT_LIST_DIR}/library/thread_data.hpp
     ${CMAKE_CURRENT_LIST_DIR}/library/thread_sampler.hpp
     ${CMAKE_CURRENT_LIST_DIR}/library/timemory.hpp
+    ${CMAKE_CURRENT_LIST_DIR}/library/tracing.hpp
     ${CMAKE_CURRENT_LIST_DIR}/library/utility.hpp
     ${CMAKE_CURRENT_LIST_DIR}/library/components/fwd.hpp
     ${CMAKE_CURRENT_LIST_DIR}/library/components/backtrace.hpp
+    ${CMAKE_CURRENT_LIST_DIR}/library/components/category_region.hpp
     ${CMAKE_CURRENT_LIST_DIR}/library/components/fork_gotcha.hpp
     ${CMAKE_CURRENT_LIST_DIR}/library/components/functors.hpp
     ${CMAKE_CURRENT_LIST_DIR}/library/components/mpi_gotcha.hpp