EDITOR HOW TO GET A TEXT FILE OBJECT OR INSTANCE ID TO FOCUS THE PROJECT WINDOW ON IT

I WANT TO FOCUS THE PROJECT WINDOW ON A "txt" FILE BUT I CAN'T GET AN INSTANCE ID OR AN OBJECT OF IT TO MAKE THE PING FUNCTION WORK

Here is a code template of what i wanna do:

 using UnityEngine;
 using UnityEditor;
 using System.IO;
 using System;
 using System.Reflection;
 using System.Collections.Generic;
 
 //That's what im using for the rest of the script
 
 ///
 
 File.WriteAllText("Assets/Test.txt", "text file");
 
 DirectoryInfo dir = new DirectoryInfo("Assets");
 FileInfo[] files = dir.GetFiles();
 
 FileInfo file = null;
 
 foreach (var item in files)
 {
     if (item.name.Contains("Test"))
         {
                 file = item;
         }
 }
 
 //The file i want doesn't have an Instance ID or an Object reference to ping it in the editor
 EditorGUIUtility.PingObject(file);