README: add DeepWiki badge [ci skip]

An interesting website

Author: CarterLi

README.md

@@ -10,6 +10,7 @@
 [![GitHub release (with filter)](https://img.shields.io/github/v/release/fastfetch-cli/fastfetch?logo=github)](https://github.com/fastfetch-cli/fastfetch/releases)
 [![latest packaged version(s)](https://repology.org/badge/latest-versions/fastfetch.svg)](https://repology.org/project/fastfetch/versions)
 [![Packaging status](https://repology.org/badge/tiny-repos/fastfetch.svg)](https://repology.org/project/fastfetch/versions)
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/fastfetch-cli/fastfetch)
 
 Fastfetch is a [neofetch](https://github.com/dylanaraps/neofetch)-like tool for fetching system information and displaying it in a visually appealing way. It is written mainly in C, with a focus on performance and customizability. Currently, it supports Linux, macOS, Windows 7+, Android, FreeBSD, OpenBSD, NetBSD, DragonFly, Haiku, and SunOS.