fix: Refactor test command handling with modular structure and common utilities

- 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.

src/cli/service/gemini_ai_service.cc

@@ -10,8 +10,8 @@
 #include "absl/strings/strip.h"
 
 #ifdef YAZE_WITH_JSON
-#include "incl/httplib.h"
-#include "third_party/json/src/json.hpp"
+#include "httplib.h"
+#include "nlohmann/json.hpp"
 #endif
 
 namespace yaze {