feat: Move openInSameWindow function to a separate file

- Moved the openInSameWindow function from MapComponent.js to a new file openInSameWindow.js in the utils directory.
- Updated MapComponent.js to import and use the openInSameWindow function from the new file.
- This change improves code modularity and readability.

utils/openInSameWindow.js

@@ -0,0 +1,10 @@
+// utils/openInSameWindow.js
+
+export function openInSameWindow(e, marker, baseUrl) {
+  if (marker && marker.options && marker.options.link) {
+    //console.log("Marker data:", baseUrl + marker.options.link);
+    window.location.href = baseUrl + marker.options.link;
+  } else {
+    console.error("Fehler: Marker hat keine gültige 'link' Eigenschaft");
+  }
+}