docs: Add demo images and update README to display them.

Author: netshdev

README.md

@@ -6,6 +6,11 @@ A visual tool to demonstrate image compression by removing color information.
 
 MonoPixel strips hue and saturation data from images to convert them to grayscale. It calculates and visualizes the space saved by this process, helping compare file sizes between full-color and monochrome versions.
 
+## DEMO
+
+![Demo](public/demo.png)
+![Demo 2](public/demo2.png)
+
 ## Stack
 
 - React + Vite