add JerryScript test file and update README.md

APP_Framework/lib/JerryScript/testflie/mathfunction.js

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+/**
+ * File: mathUtils.js
+ * Function: Math utilities
+ * Description: Contains various math utility functions.
+ */
+
+// Calculates the square of a number
+function square(number) {
+  var square = number * number;
+  console.log("The square of", number, "is", square);
+  return square;
+}
+
+// Calculates the cube of a number
+function cube(number) {
+  var cube = number * number * number;
+  console.log("The cube of", number, "is", cube);
+  return cube;
+}
+
+// Calculates the average of an array of numbers
+function average(numbers) {
+  var sum = numbers.reduce(function (acc, curr) {
+    return acc + curr;
+  }, 0);
+  var avg = sum / numbers.length;
+  console.log("The average of the following numbers:",numbers,"is", avg);
+  return avg;
+}
+
+var num = 7;
+var arr = [17, 12, 33, 24, 45, 36, 18, 85, 97, 48];
+
+var res1 = square(num);
+var res2 = cube(num);
+var res3 = average(arr);