- Added new `test_common` module with helper functions for prompting and input handling.
- Introduced `test_common.cc` and `test_common.h` for shared functionality across test commands.
- Updated `z3ed.cmake` to include `test_common` in the build process.
- Refactored `test_commands.cc` to utilize new common utilities for improved readability and maintainability.
- Adjusted paths for source files in the build configuration to ensure proper linking.
This commit lays the groundwork for a more organized and modular approach to handling test commands, facilitating future enhancements and maintenance.
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