Add Zig extension for Zed (#160)

Author: TheConnorJohnson

README.md

@@ -90,6 +90,7 @@ TOC is generated by [markdown-toc](https://github.com/jonschlinkert/markdown-toc
 - [ziglang/zig.vim](https://codeberg.org/ziglang/zig.vim) : Vim configuration for Zig.
 - [ziglang/zig-mode](https://codeberg.org/ziglang/zig-mode) : Zig mode for Emacs.
 - [zigtools/zls](https://github.com/zigtools/zls) : The @ziglang language server for all your Zig editor tooling needs, from autocomplete to goto-def! [install.zigtools.org/](https://install.zigtools.org/)
+- [zed-extensions/zig](https://github.com/zed-extensions/zig) : Zig extension for Zed editor.
 - [jinzhongjia/zig-lamp](https://github.com/jinzhongjia/zig-lamp) : Improve the Zig development experience in Neovim.
 - [neurocyte/flow](https://github.com/neurocyte/flow) : Flow Control - a programmer's text editor written in Zig.