feat: adds try-catch blocks with exceptions

chore: comments for reference

Author: AmiyahJo

lesson_14/exceptions/exceptions_app/src/main/java/com/codedifferently/lesson14/Lesson14.java

@@ -3,6 +3,16 @@
 public class Lesson14 {
 
   public static void main(String[] args) {
-    System.out.println("Hello World");
+    // System.out.println("Hello World");
+    try {
+      ecommerceSystem.placeOrder("1", 1);  
+    } catch (ProductNotFoundException e) {
+      System.out.println("Product not found.");
+    } catch (OrderNotFoundException e){
+      System.out.println("Order not found.");
+    }
   }
 }
+
+//ProductNotFoundException <- for product does not exist
+//OrderNotFoundException <- for both order does not exist and order cancelled