feat: Add Bitwise7 class to compare signed right shift on positive and negative integers

Add a program that:
- Applies signed right shift (`>>`) to both positive and negative integers
- Demonstrates how sign extension affects the result of shifting negative numbers
- Includes a commented unsigned right shift (`>>>`) line for future comparison
- Helps visualize bitwise behavior using binary interpretation.

Author: Someshdiwan

Section5OperatorExpression/src/Bitwise7.java

@@ -3,8 +3,9 @@ public static void main(String[] args)
     {
         int x = 8;    //  00001000 (Binary)
         System.out.println(x >> 1); // 00000100 -> Output: 4
+        //System.out.println(x >>> 2);
 
         int y = -8;   //  11111000 (Binary in Two's Complement)
         System.out.println(y >> 1); // 11111100 -> Output: -4
     }
-}
+}