docs: added javadoc to UserPageView

src/main/java/edu/group5/app/view/userpage/UserPageView.java

@@ -23,7 +23,18 @@
 import java.text.SimpleDateFormat;
 import java.util.*;
 
-
+/**
+ * A view for the user profile page.
+ *
+ * <p>Displays the current user's profile information,
+ * including avatar, full name, email and location, along with a logout button.
+ * The page is divided into three sections:
+ * Profile information, Supported causes, and previous donations.</p>
+ *
+ * <p>Supported causes shows all the organizations that the user has donated to.
+ * Previous donations shows a list of all the user's donations,
+ * and includes a search bar to filter through them.</p>
+ */
 public class UserPageView extends BorderPane {
   private final NavigationController nav;
   private final AuthController authController;