feat(presenter): connect collection creation and viewing flows

app/src/main/java/ru/project/App.java

@@ -23,6 +23,7 @@ public final class App {
       MultiWindowTextGUI gui = new MultiWindowTextGUI(screen);
 
       AppState state = new AppState();
+
       MainView view = new MainView();
 
       MainPresenter presenter = new MainPresenter(state, view, gui);

app/src/main/java/ru/project/presenter/MainPresenter.java

@@ -2,16 +2,27 @@ package ru.project.presenter;
 
 import com.googlecode.lanterna.gui2.WindowBasedTextGUI;
 import ru.project.model.AppState;
+import ru.project.view.CollectionView;
+import ru.project.view.CreateCollectionView;
 import ru.project.view.MainView;
 
 public class MainPresenter extends BasePresenter {
 
   private final MainView view;
 
+  private final CollectionPresenter collectionPresenter;
+  private final CreateCollectionPresenter createCollectionPresenter;
+
   public MainPresenter(AppState state, MainView view, WindowBasedTextGUI gui) {
     super(state, gui);
+
     this.view = view;
 
+    this.collectionPresenter = new CollectionPresenter(state, new CollectionView(), gui);
+
+    this.createCollectionPresenter =
+        new CreateCollectionPresenter(state, new CreateCollectionView(), gui);
+
     bindActions();
   }
 
@@ -31,11 +42,11 @@ public class MainPresenter extends BasePresenter {
   }
 
   private void showCollection() {
-    // TODO
+    collectionPresenter.start();
   }
 
   private void createCollection() {
-    // TODO
+    createCollectionPresenter.start();
   }
 
   private void saveCollection() {