feat: add SignInPageView into MainView and controllers

src/main/java/edu/group5/app/control/MainController.java

@@ -16,7 +16,9 @@ public void showHomePage() {
   public void showLoginPage() {
     view.showLoginPage();
   }
-
+  public void showSignInPage() {
+    view.showSignInPage();
+  }
   public void showBrowsePage() {
     view.showBrowsePage();
   }

src/main/java/edu/group5/app/control/SignInPageController.java

@@ -1,4 +1,10 @@
 package edu.group5.app.control;
 
 public class SignInPageController {
+  private final MainController controller;
+
+  public SignInPageController(MainController controller) {
+    this.controller = controller;
+  }
+
 }

src/main/java/edu/group5/app/view/MainView.java

@@ -1,26 +1,29 @@
 package edu.group5.app.view;
 
-import edu.group5.app.control.HeaderController;
-import edu.group5.app.control.HomePageController;
-import edu.group5.app.control.MainController;
+import edu.group5.app.control.*;
 import edu.group5.app.view.homepage.HomePageView;
 import edu.group5.app.view.loginpage.LoginPageView;
+import edu.group5.app.view.loginpage.SignInPageView;
 import javafx.scene.Scene;
 import javafx.scene.layout.BorderPane;
 
 public class MainView {
   private final HeaderController headerController;
   private final HomePageController homePageController;
+  private final LoginPageController loginPageController;
+  private final SignInPageController signInPageController;
   private final BorderPane root;
 
   public MainView(MainController mainController) {
     this.headerController = new HeaderController(mainController);
     this.homePageController = new HomePageController(mainController);
+    this.loginPageController = new LoginPageController(mainController);
+    this.signInPageController = new SignInPageController(mainController);
     this.root = new BorderPane();
   }
 
   public Scene createView() {
-    root.setCenter(new LoginPageView(headerController));
+    root.setCenter(new LoginPageView(loginPageController, headerController));
     return new Scene(root, 1280, 720);
   }
 
@@ -29,9 +32,11 @@ public void showHomePage() {
   }
 
   public void showLoginPage() {
-
+    root.setCenter(new LoginPageView(loginPageController, headerController));
+  }
+  public void showSignInPage() {
+    root.setCenter(new SignInPageView(signInPageController, headerController));
   }
-
   public void showBrowsePage() {}
 
   public void showAboutUsPage() {}

src/main/java/edu/group5/app/view/loginpage/SignInPageView.java

@@ -1,4 +1,17 @@
 package edu.group5.app.view.loginpage;
 
-public class SignInView {
+import edu.group5.app.control.HeaderController;
+import edu.group5.app.control.SignInPageController;
+import javafx.scene.layout.BorderPane;
+
+
+public class SignInPageView extends BorderPane {
+  private final SignInPageController controller;
+
+  public SignInPageView(SignInPageController signInPageController, HeaderController headerController) {
+    this.controller = signInPageController;
+    setTop(new LoginHeader(headerController));
+
+
+  }
 }