Implement test suite loading and reporting functionality

- Added `TestSuiteDefinition`, `TestGroupDefinition`, and `TestCaseDefinition` structures to represent test suite configurations.
- Implemented parsing logic for test suite definitions from a file in `test_suite_loader.cc` and `test_suite_loader.h`.
- Introduced `ReplayTestResult` structure in `gui_automation_client.h` to handle results from replaying tests.
- Added `ReplayTest` method in `GuiAutomationClient` to facilitate test replay functionality.
- Created `BuildTextSummary` and `BuildJUnitReport` functions in `test_suite_reporter.cc` for generating test reports.
- Implemented `WriteJUnitReport` function to save JUnit formatted reports to a specified output path.
- Enhanced error handling and logging throughout the new functionalities.

src/cli/service/gui_automation_client.h

@@ -125,6 +125,15 @@ struct TestResultDetails {
   std::string widget_state;
 };
 
+struct ReplayTestResult {
+  bool success = false;
+  std::string message;
+  std::string replay_session_id;
+  int steps_executed = 0;
+  std::vector<AssertionOutcome> assertions;
+  std::vector<std::string> logs;
+};
+
 enum class WidgetTypeFilter {
   kUnspecified,
   kAll,
@@ -290,6 +299,10 @@ class GuiAutomationClient {
   absl::StatusOr<DiscoverWidgetsResult> DiscoverWidgets(
       const DiscoverWidgetsQuery& query);
 
+  absl::StatusOr<ReplayTestResult> ReplayTest(
+    const std::string& script_path, bool ci_mode,
+    const std::map<std::string, std::string>& parameter_overrides = {});
+
   /**
    * @brief Check if client is connected
    */