feat: Add ReadingFromKeyBoard class to read integers and compute their sum

Add a program that:
- Uses `Scanner` to read two integers from user input
- Computes and prints their sum
- Demonstrates basic input handling and arithmetic operations in Java.

Author: Someshdiwan

Section5OperatorExpression/src/ReadingFromKeyBoard.java

@@ -2,14 +2,15 @@
 import java.util.*;
 
 public class ReadingFromKeyBoard {
-    public static void main(String args[])
-    {
+    public static void main(String args[]) {
         Scanner s = new Scanner(System.in);
         int a, b, c;
-        System.out.print("Enter 2 number");
+        System.out.print("Enter 2 number: ");
+
         a = s.nextInt();
         b = s.nextInt();
         c = a+b;
-        System.out.println("Sum of two number is"+ c);
+
+        System.out.println("Sum of two number is: "+ c);
     }
-}
+}