feat: Implement UIAlert class for transaction alerts

src/main/java/edu/ntnu/idi/idatt/view/components/ui/UIAlert.java

@@ -0,0 +1,26 @@
+package edu.ntnu.idi.idatt.view.components.ui;
+
+import javafx.scene.control.Alert;
+import javafx.scene.control.Alert.AlertType;
+import javafx.scene.control.ButtonType;
+
+public class UIAlert {
+
+  Alert alert = new Alert(AlertType.CONFIRMATION);
+  ButtonType confirm = new ButtonType("Confirm");
+  ButtonType cancel = new ButtonType("Cancel");
+
+  public UIAlert(String title, String header, String content) {
+    alert.setTitle(title);
+    alert.setHeaderText(header);
+    alert.setContentText(content);
+
+    alert.getButtonTypes().setAll(confirm, cancel);
+  }
+
+  public boolean displayAwaitResponse() {
+    ButtonType type = alert.showAndWait().orElse(cancel);
+    return type == confirm ? true : false;
+  }
+
+}