Add basic test client (#156)

Co-authored-by: star9029 <hengxings783@gmail.com>

tests/unit/AST/SemanticVisitor.cpp

@@ -0,0 +1,9 @@
+#include "Test/Test.h"
+#include "AST/Semantic.h"
+
+namespace clice::testing {
+
+namespace {}  // namespace
+
+}  // namespace clice::testing
+