Refactor code structure and remove redundant changes

src-old/lib/integrationTests/index.ts

@@ -0,0 +1,10 @@
+/**
+ * Integration Testing System
+ * 
+ * Main exports for the comprehensive integration testing framework.
+ */
+
+export { IntegrationTestRunner } from './testRunner';
+export { allTestSuites } from './suites';
+
+export type { TestResult, Test, TestSuite } from './testRunner';