Feat: Add declarations of JavaFX elements

CityDoctorParent/Extensions/CityDoctorGUI/src/main/java/de/hft/stuttgart/citydoctor2/gui/ZipEntryPicker.java

 package de.hft.stuttgart.citydoctor2.gui;
 
+import de.hft.stuttgart.citydoctor2.gui.tree.ZipEntryListCell;
+import de.hft.stuttgart.citydoctor2.gui.tree.ZipEntryNode;
+import de.hft.stuttgart.citydoctor2.utils.Localization;
+import de.hft.stuttgart.citydoctor2.zip.CityGmlZipArchive;
+import de.hft.stuttgart.citydoctor2.zip.CityGmlZipEntry;
+import de.hft.stuttgart.citydoctor2.zip.ZipEntryErrorType;
+import javafx.application.Platform;
 import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Scene;
 import javafx.scene.control.Button;
-import javafx.scene.control.TextArea;
+import javafx.scene.control.Label;
+import javafx.scene.control.ListView;
+import javafx.scene.control.TextField;
+import javafx.scene.control.TitledPane;
 import javafx.scene.image.Image;
 import javafx.scene.input.KeyCode;
 import javafx.scene.input.KeyEvent;
@@ -22,15 +32,45 @@ public class ZipEntryPicker {
     private static final Logger logger = LogManager.getLogger(ZipEntryPicker.class);
 
     private Stage stage;
+    private CityGmlZipArchive archive;
 
     @FXML
-    private Button cancelBtn;
+    private TitledPane entriesPane;
+    @FXML
+    private TitledPane metadataPane;
+
+    @FXML
+    private Label subpathLbl;
+    @FXML
+    private TextField subpathValueTxt;
 
+    @FXML
+    private Label erroneousLbl;
+    @FXML
+    private Label erroneousValue;
+
+    @FXML
+    private Label filesizeLbl;
+    @FXML
+    private Label filesizeValue;
+
+    @FXML
+    private Label validatedLbl;
+    @FXML
+    private Label validatedValue;
+
+    @FXML
+    private Label objectCountLbl;
+    @FXML
+    private Label objectCountValue;
+
+    @FXML
+    private Button cancelBtn;
     @FXML
     private Button loadBtn;
 
     @FXML
-    private TextArea metaArea;
+    private ListView<ZipEntryNode> entryList;
 
     private CityDoctorController controller;