feat: Add a simulated JSON parsing benchmark to json_bench.prox.

Author: ProgrammerKR

benchmarks/macro/json_bench.prox

@@ -106,7 +106,7 @@ func main() {
 
     print("JSON Length: " + to_string(len(json_str)));
 
-    let start = time();
+    let start = clock();
 
     let parser = JsonParser(json_str);
     let res = parser.parse();