update readme

update readme

Author: rcsofttech85

README.md

@@ -8,6 +8,25 @@ A simple PHP file helper for various file operations.
 
 ---
 
+## Table of Contents
+
+*   [About](#about)
+*   [Installation](#installation)
+*   [Usage](#usage)
+    *   [Search by Keyword](#search-by-keyword)
+    *   [Search by keyword and return array](#search-and-return-array)
+    *   [Write Multiple Files](#write-multiple-files-simultaneously)
+    *   [Converting File to Array](#converting-file-to-an-array)
+    *   [Find and Replace in CSV](#find-and-replace-in-csv-file)
+    *   [Converting File to JSON](#converting-file-to-json-format)
+    *   [Encrypt and Decrypt Files](#encrypt-and-decrypt-files)
+    *   [Stream and Save Content from URL](#stream-and-save-content-from-url-to-file)
+    *   [File Compression and Decompression](#file-compression-and-decompression)
+    *   [File Difference](#file-difference)
+    *   [File Integrity check](#file-integrity-check)
+    *   [View CSV in Terminal (table format)](#view-csv-in-terminal)
+    *   [View JSON in Terminal (table format)](#view-json-in-terminal)
+
 ## About
 
 This PHP File Helper is designed to simplify various file-related operations. It offers a range of features to handle