feat: add NestedLoop2DArrayTraversal to demonstrate 2D array population and iteration

Implemented NestedLoop2DArrayTraversal.java to showcase filling a 3x5 matrix
with sequential values using nested loops and printing each element with its
row and column indices. Highlights basic 2D array traversal and indexing logic.

Signed-off-by: https://github.com/Someshdiwan <someshdiwan369@gmail.com>

Author: Someshdiwan

Section9ArrayAB/Array 2.0/src/NestedLoop2DArrayTraversal.java

@@ -0,0 +1,20 @@
+class NestedLoop2DArrayTraversal {
+    public static void main(String[] args) {
+        int[][] dataTable = new int[3][5];  // Declare a 3x5 matrix
+
+        // Populate the array with sequential numbers starting from 10
+        int num = 10;
+        for (int i = 0; i < dataTable.length; i++) {
+            for (int j = 0; j < dataTable[i].length; j++) {
+                dataTable[i][j] = num++;
+            }
+        }
+
+        // Iterate and print each element with its position
+        for (int i = 0; i < dataTable.length; i++) {
+            for (int j = 0; j < dataTable[i].length; j++) {
+                System.out.println("Element at [" + i + "][" + j + "] = " + dataTable[i][j]);
+            }
+        }
+    }
+}