- Add support for # (stringify) and ## (concatenation) operators in macro replacement lists
- Implement scc_pp_expand_string_unsafe() to process operator tokens during macro expansion
- Add helper macros to identify blank, stringify, and concatenation tokens in replacement lists
- Include missing headers (ctype.h, string.h) for character handling functions
- Update object macro expansion to use new string expansion function instead of simple concatenation
- Improve whitespace handling in macro replacement parsing to prevent interference with operator processing
- Add `-fprofile-update=atomic` flag to both GCC and Clang compiler configurations for thread-safe coverage data updates
- Change `--all` argument in clean command to default to True and add `-a` short option for consistency with common CLI patterns
- Introduce Translator class for simple i18n with English and Chinese locales
- Add concurrent.futures, os, and locale imports for parallel execution and language detection
- Implement automatic language detection based on system locale
- Provide translation keys for build messages, test results, and command outputs
- Support dynamic language switching via set_language method
- Refactor logging system with simplified ColorFormatter and improved output formatting
- Add test command with regex pattern matching and timeout support
- Implement file size formatting utility for build output
- Remove unused imports and streamline code structure
- Update .gitignore to exclude external/ directory
- Improve error handling and subprocess management in test execution
- Optimize build dependency resolution with topological sorting
- Enhance configuration parsing and target management
The changes focus on code quality improvements, adding testing capabilities, and optimizing the build process for better performance and maintainability.
