add method for getting property in filepreferences

Author: Kaan0029

jablib/src/main/java/org/jabref/logic/FilePreferences.java

@@ -272,4 +272,8 @@ public String getOcrTessdataPath() {
     public void setOcrTessdataPath(String path) {
         this.ocrTessdataPath.set(path);
     }
+
+    public StringProperty ocrTessdataPathProperty() {
+        return ocrTessdataPath;
+    }
 }