Version 1.13.0

• Move source code into subdirectories matching their namespaces.
• Split InterHex into two files to isolate responsibilities.
• Add passed test count to the dedicated Python test script.
• Improve MSVC/GCC test handling logic in CMake files.
• Update googletest retrieval strategy for better compatibility and reliability.
• Remove several unique_ptr usages that triggered noisy SonarCloud warnings.
• Suppress irrelevant SonarCloud rules S5421 and S6022 in specific areas to reduce false positives.