test: integration tests for imports

extension/examples/invalid/semantics/badWacc.wacc

@@ -0,0 +1,10 @@
+begin
+  int main() is
+    int a = 5 ;
+    string b = "Hello" ;
+    return a + b
+  end
+
+  int result = call main() ;
+  exit result
+end