feat: adds BusinessCheckingAccount class

Author: Evan Philakhong

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/Customer.java

@@ -19,7 +19,7 @@ public class Customer {
   /**
    * Creates a new customer.
    *
-   * @param id The ID of the customer.
+   * @param id   The ID of the customer.
    * @param name The name of the customer.
    * @param type The type of customer (individual or business)
    */
@@ -29,6 +29,19 @@ public Customer(UUID id, String name, CustomerType type) {
     this.type = type;
   }
 
+  /**
+   * Creates an new individual customer.
+   *
+   * @param id   The ID of the customer.
+   * @param name The name of the customer.
+   * @param type The type of custimer (individual or business)
+   */
+  public Customer(UUID id, String name, Customer type) {
+    this.id = id;
+    this.name = name;
+    this.type = CustomerType.INDIVIDUAL;
+  }
+
   /**
    * Adds a checking account to the customer.
    *