c++ Encryption Fix

I need the libntru-qt project fixed to a working state on Linux. The primary functionality required is basic encryption/decryption.

https://github.com/netpipe/libntru-qt/tree/main

Requirements:
- Set up and fix the existing codebase.
- Ensure basic encryption/decryption functionalities work as intended.
- No specific dependencies or libraries are required.

Ideal Skills:
- Experience with C++ and Qt.
- Familiarity with encryption libraries and concepts.