boost::string_file was removed in Boost 1.84

Summary

The string_file.h header was deprecated In Boost 1.79 and removed in 1.84. It is only used in utility.cpp to read a file into a std::string. Using it limits updating our dependencies.

Expected Behavior

The cpplib should be usable with current Boost versions.

Specifications

• Version: 0.3.0-dev
• Platform: any

Possible fixes

Re-implement load_string_file with a simple function.