add support for resolving parameters in function body

examples/hello.ry

@@ -42,8 +42,8 @@ fn multwo(num: i32, double_flag: bool) i32 {
     }
 }
 
-fn multwo_with_one(b: i32) i32 {
-    return multwo(b, false) + b;
+fn func_refer_param(b: i32) i32 {
+    return b * 231 + b;
 }
 
 fn add(a: i32, b: i32) i32 {