[Dana] Semantically Erroneous Program (#68)

Add a semantically erroneous program with all sorts of errors.

Author: JohnnyPol

dana/programs-erroneous/semantic_error.dana

@@ -0,0 +1,10 @@
+def main
+  var x y is int
+  var s is byte[10]
+
+  x := z            # Error: z is not declared
+  return: x + s     # Error: cannot add int and byte[]
+  break             # Error: break outside loop
+  continue          # Error: continue outside loop
+  callMe: 10        # Error: callMe is not declared
+  return: foo(1, 2) # Error: foo is not defined