Switch argument parsing to cxxopt.hpp

Author: mbailleu

.codespellrc

@@ -2,5 +2,5 @@
 builtin = clear,rare,en-GB_to_en-US,names,informal,code
 check-filenames =
 check-hidden =
-skip = */.git,*/build,*/.ccls-cache,*/.mypy_cache
+skip = */.git,*/build,*/.ccls-cache,*/.mypy_cache,*/extern
 quiet-level = 2

CMakeLists.txt

@@ -27,6 +27,7 @@ find_package(fmt REQUIRED)
 
 include_directories(SYSTEM ${Protobuf_INCLUDE_DIRS})
 include_directories(SYSTEM ${CMAKE_CURRENT_BINARY_DIR})
+include_directories(SYSTEM ${CMAKE_CURRENT_SOURCE_DIR}/extern/include)
 protobuf_generate_cpp(PROTO_SRCS_CLIENT PROTO_HDRS_CLIENT source/client_message.proto)
 protobuf_generate_cpp(PROTO_SRCS_SERVER PROTO_HDRS_SERVER source/server_message.proto)