support JSON modules in qjsc - added support of JSON5 modules (using type = "json5")

examples/hello_module.js

@@ -1,6 +1,8 @@
-/* example of JS module */
+/* example of JS and JSON modules */
 
 import { fib } from "./fib_module.js";
+import msg from "./message.json";
 
 console.log("Hello World");
 console.log("fib(10)=", fib(10));
+console.log("msg=", msg);

examples/message.json

@@ -0,0 +1,2 @@
+{ "x" : 1, "tab": [ 1, 2, 3 ] }
+