docs(README): Add demo GIF

Author: Fuwn

README.md

@@ -2,13 +2,14 @@
 
 ![](assets/para.png)
 
-[![Crate](https://img.shields.io/crates/v/para-cli.svg)](https://crates.io/crates/para-cli)
-[![Build Status](https://github.com/Fuwn/para/actions/workflows/rust.yaml/badge.svg?branch=main)](https://github.com/Fuwn/para/actions/workflows/rust.yaml)
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 ## What?
 
 A decoder and utility for the Flipnote Studios `.ppm` animation format.
 
+<br />
+
+<p align="center"><img src="assets/demo.gif" width="65%"></center>
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 ## Why this implementation over [the original](https://github.com/Flipnote-Collective/ppm-parser)?
 
 This implementation is