docs: Update README to enhance project description and add features section

Author: shivabhusal

README.md

@@ -2,10 +2,22 @@
     <img src="src/images/banner.webp" alt="leetcode cheatsheet banner" width="768" height="420">
 </p>
 
-- big o time/space complexities
-- code templates
-- data structure implementations
-- sorting algorithms
+## LeetCode Cheatsheet
+A comprehensive cheatsheet for LeetCode enthusiasts, featuring essential algorithms, data structures, and problem-solving techniques.
+
+## Features
+- Big O time and space complexities for common algorithms
+- Code templates for frequently used algorithms
+- Implementations of various data structures
+- Sorting algorithms with explanations
+
+## Building the Project
+To build the LeetCode Cheatsheet project, follow these steps:
+
+```bash
+$ npm run build
+```   
 
 ## License
+
 This project is released under the GNU GPL License - see the [LICENSE](LICENSE) file for details