- move script as asset because they are not build script
- create new script directory for "User Compile" method because github action need to build with gtest.
- change compile manual for this change.
- modify external dependency location in github action and gitignore.
- switch to CMake build system and delete original project files because Visual Studio supports CMake project debugging.
- there is a UTF-8 bug for library after switching, but I don't know why it happends. maybe fixed in future.
