feat: Add Bitwise6 class demonstrating signed right shift on negative number

Add a program that:
- Initializes a negative integer using a binary literal
- Applies a signed right shift (`>>`) by 1 bit
- Outputs the result to show how sign extension works in Java
- Prepares for unsigned right shift (`>>>`) with commented code for comparison.

Author: Someshdiwan

Section5OperatorExpression/src/Bitwise6.java

@@ -1,15 +1,15 @@
-public class Bitwise6
-{
+public class Bitwise6 {
     public static void main(String[] args) {
         int x = -0b1010;
         int y;
 
-        y=x>>>1;
-        //y=x>>1;
+        //y=x>>>1;
+        y=x>>1;
 
         System.out.println(y);
     }
 }
+
 /*
 x = -0b1010 (Binary Representation)
 
@@ -20,6 +20,7 @@ public static void main(String[] args) {
 
 >>> is the logical right shift operator.
 Unlike >> (arithmetic right shift), >>> does not preserve the sign bit.
+
 It fills the leftmost bit with 0 (zero-fill), regardless of whether x is positive or negative.
 Effectively divides by 2 for positive numbers, but changes negative numbers significantly.
-*/
+*/