1. Fix possible problems with mac compilation
2. Add new third-party dependency libconfig
3. Use the correct project configuration to specify the C++ standard
1. All third-party dependencies are in the form of submodules .
2. Compile third-party dependencies together at compile time.
3. Strip 3rd party dependencies from source code.
4. Normalize the reference of the header file of the third-party dependency, and only refer to it once.
5. Remove all find_libraries and use build-time static library files instead.
