Updated the bash script for building the project to improve dependency management. Added error checks, structured the code into modular functions, and implemented detection and installation of necessary packages if not already present. This increases the reliability and flexibility of the build script, and simplifies its usage and maintenance.

Changed the COLOR map in utils.hpp from const to static const. This change ensures thread safety and makes sure that the map is shared across all instances of the object, helping reduce memory usage.

Optimized file shredding process by writing random data in buffer-sized chunks, rather than byte by byte, which significantly improves performance. Introduced proper error handling in case of write failure and adjusted buffer size for the last chunk of data when it's smaller than buffer size. Made consistent formatting adjustments. Also, reference was added to overwriteConstantByte function parameter for optimization.

The code for the file shredder in shredFiles.cpp was refactored to improve readability and maintainability. The type of BUFFER_SIZE was changed from std::size_t to std::streamoff to improve performance and increase precision for larger files. Also, direct file operations were replaced with FileDescriptor and FileStatInfo structures for better error handling and code clarity.