add leetcode repo logo

Author: ashishps1

README.md

@@ -1,4 +1,9 @@
-# Awesome LeetCode Resources
+<p align="center">
+  <img src="images/leetcode-repo-logo.png" width="350" height="200">
+</p>
+<p align="center">
+  <a href="https://www.linkedin.com/in/ashishps1/">LinkedIn</a> | <a href="https://www.youtube.com/@ashishps_1/videos">YouTube</a> | <a href="https://twitter.com/ashishps_1">X</a> | <a href="https://newsletter.ashishps.com/">Newsletter</a>
+</p>
 This repository contains LeetCode resources which are useful during interview preparation.
 
 ## Fundamental Concepts