added App file anf modified README file and pom.xml file

Author: Ahmed-Taha-981

money/src/main/java/com/iluwatar/App.java

@@ -0,0 +1,51 @@
+package com.iluwatar;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class App {
+
+  // Initialize the logger
+  private static final Logger logger = Logger.getLogger(App.class.getName());
+
+  public static void main(String[] args) {
+    // Create instances of Money
+    Money usdAmount1 = new Money(50.00, "USD");
+    Money usdAmount2 = new Money(20.00, "USD");
+
+    // Demonstrate addition
+    try {
+      usdAmount1.addMoney(usdAmount2);
+      logger.log(Level.INFO, "Sum in USD: {0}", usdAmount1.getAmount());
+    } catch (CannotAddTwoCurrienciesException e) {
+      logger.log(Level.SEVERE, "Error adding money: {0}", e.getMessage());
+    }
+
+    // Demonstrate subtraction
+    try {
+      usdAmount1.subtractMoney(usdAmount2);
+      logger.log(Level.INFO, "Difference in USD: {0}", usdAmount1.getAmount());
+    } catch (CannotSubtractException e) {
+      logger.log(Level.SEVERE, "Error subtracting money: {0}", e.getMessage());
+    }
+
+    // Demonstrate multiplication
+    try {
+      usdAmount1.multiply(2);
+      logger.log(Level.INFO, "Multiplied Amount in USD: {0}", usdAmount1.getAmount());
+    } catch (IllegalArgumentException e) {
+      logger.log(Level.SEVERE, "Error multiplying money: {0}", e.getMessage());
+    }
+
+    // Demonstrate currency conversion
+    try {
+      double exchangeRateUsdToEur = 0.85; // Example exchange rate
+      usdAmount1.exchangeCurrency("EUR", exchangeRateUsdToEur);
+      logger.log(Level.INFO, "USD converted to EUR: {0} {1}", new Object[]{usdAmount1.getAmount(), usdAmount1.getCurrency()});
+    } catch (IllegalArgumentException e) {
+      logger.log(Level.SEVERE, "Error converting currency: {0}", e.getMessage());
+    }
+
+  }
+}
+