feat: Add ShortcutOperators class demonstrating compound assignment and increment/decrement

Add a class to illustrate shortcut operators in Java including:
- Post-increment (x++) and post-decrement (z--)
- Compound addition (y += x)
- Compound multiplication (z *= x - y)
- Step-by-step output showing value updates.

Author: Someshdiwan

Section5OperatorExpression/1. Fundamentals/Operators/Shortcut Operators/src/ShortcutOperators.java

@@ -3,13 +3,17 @@ public class ShortcutOperators
    public static void main(String[] args)
    {
       int x = 1, y = 3, z = -2;
+
       x++; //x is incremented by 1
       System.out.println("x is now " + x);
+
       z--; //z is decremented by 1
       System.out.println("z is now " + z);
+
       y += x; //y increases by the current value of x
       System.out.println("y is now " + y);
+
       z *= x-y; //z gets multiplied by the difference between x and y
       System.out.println("z is finally " + z);
    }
-}
+}