test: integration tests for imports

extension/examples/invalid/semantics/imports/importBadSem.wacc

@@ -0,0 +1,10 @@
+import "../badWacc.wacc" (main)
+
+begin
+  int sum(int a, int b) is
+    return a + b
+  end
+
+  int result = call main() ;
+  exit result
+end