Add imports for Root_meta_pure_test classes to fix build failure

Author: devin-ai-integration[bot]

showcases/src/test/java/org/example/ShowcaseCompilerTest.java

@@ -23,6 +23,8 @@
 import org.finos.legend.engine.testable.extension.TestableRunnerExtensionLoader;
 import org.finos.legend.engine.testable.model.RunTestsResult;
 import org.finos.legend.engine.testable.model.RunTestsTestableInput;
+import org.finos.legend.pure.generated.Root_meta_pure_test_AtomicTest;
+import org.finos.legend.pure.generated.Root_meta_pure_test_TestSuite;
 import org.finos.legend.pure.m3.coreinstance.meta.pure.metamodel.testable.Test;
 import org.finos.legend.pure.m3.coreinstance.meta.pure.metamodel.testable.TestAccessor;
 import org.finos.legend.pure.m3.coreinstance.meta.pure.metamodel.testable.Testable;