Refactor: Use Files.exists() for file existence check

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/datastructure/LibraryObject.java

@@ -9,6 +9,7 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
 import java.io.Serial;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.List;
 import java.util.Map;
@@ -64,7 +65,7 @@ public class LibraryObject extends Geometry {
 
     private static Geometry parseFile(Path path, ParserConfiguration config) {
         Geometry geo = null;
-        if (path.toFile().exists()) {
+        if (Files.exists(path)) {
             try {
                 geo = getProtoGeometry(CityGmlParser.parseCityGmlFileSilently(path.toString(), config));
             } catch (CityGmlParseException e) {