Feat: Add decompress and load button to GUI

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

@@ -7,12 +7,39 @@
 <?import javafx.scene.control.ProgressBar?>
 <?import javafx.scene.control.TextField?>
 <?import javafx.scene.control.TitledPane?>
+<?import javafx.scene.image.ImageView?>
 <?import javafx.scene.layout.HBox?>
 <?import javafx.scene.layout.VBox?>
 <?import javafx.scene.text.Font?>
 
 <VBox xmlns="http://javafx.com/javafx/22" xmlns:fx="http://javafx.com/fxml/1">
     <children>
+        <HBox prefHeight="50.0" prefWidth="200.0" spacing="5.0">
+            <padding>
+                <Insets bottom="5.0" left="5.0" right="5.0" top="5.0"/>
+            </padding>
+            <children>
+                <Button fx:id="decompressBtn" alignment="CENTER" layoutX="15.0" layoutY="15.0"
+                        maxWidth="1.7976931348623157E308" mnemonicParsing="false">
+                    <font>
+                        <Font size="14.0"/>
+                    </font>
+                    <graphic>
+                        <ImageView fx:id="decompressImageView" fitHeight="32.0" fitWidth="32.0" pickOnBounds="true"
+                                   preserveRatio="true"/>
+                    </graphic>
+                </Button>
+                <Button fx:id="loadBtn" alignment="CENTER" maxWidth="1.7976931348623157E308" mnemonicParsing="false">
+                    <font>
+                        <Font size="14.0"/>
+                    </font>
+                    <graphic>
+                        <ImageView fx:id="loadImageView" fitHeight="32.0" fitWidth="32.0" pickOnBounds="true"
+                                   preserveRatio="true"/>
+                    </graphic>
+                </Button>
+            </children>
+        </HBox>
         <HBox fillHeight="false" prefHeight="200.0" prefWidth="600.0" VBox.vgrow="ALWAYS">
             <children>
                 <TitledPane fx:id="entriesPane" collapsible="false" text="Zip-entries" HBox.hgrow="ALWAYS">
@@ -99,12 +126,6 @@
                 </TitledPane>
             </children>
         </HBox>
-        <Button fx:id="loadBtn" alignment="CENTER" maxWidth="1.7976931348623157E308" mnemonicParsing="false"
-                text=" Load entry">
-            <font>
-                <Font size="14.0"/>
-            </font>
-        </Button>
         <HBox spacing="5.0">
             <children>
                 <ProgressBar fx:id="progress" maxWidth="1.7976931348623157E308" minHeight="40.0" prefHeight="40.0"