Update docs links to use cmux.io custom domain

- Change all docs URLs from coder.github.io/cmux to cmux.io
- Update README.md and docs/README.md

Author: ammario

README.md

@@ -1,17 +1,17 @@
-# cmux - Coding Agent Multiplexer
+# cmux - coding agent multiplexer
 
 [![CI](https://github.com/coder/cmux/actions/workflows/ci.yml/badge.svg)](https://github.com/coder/cmux/actions/workflows/ci.yml)
 [![Build](https://github.com/coder/cmux/actions/workflows/build.yml/badge.svg)](https://github.com/coder/cmux/actions/workflows/build.yml)
 
-A cross-platform desktop application for AI-assisted development with git worktree integration.
+A cross-platform desktop application for embarassingly parallel development.
 
 ## Documentation
 
-📚 **[Read the full documentation →](https://coder.github.io/cmux)**
+📚 **[Read the full documentation →](https://cmux.io)**
 
-- [Installation](https://coder.github.io/cmux/install.html)
-- [Keyboard Shortcuts](https://coder.github.io/cmux/keybinds.html)
-- [Developer Guide](https://coder.github.io/cmux/AGENTS.html)
+- [Installation](https://cmux.io/install.html)
+- [Keyboard Shortcuts](https://cmux.io/keybinds.html)
+- [Developer Guide](https://cmux.io/AGENTS.html)
 
 ## Quick Install
 

docs/README.md

@@ -19,7 +19,7 @@ bun docs:watch
 
 - ✅ **Mermaid diagrams** - Add diagrams with ` ```mermaid ` code blocks
 - ✅ **Link checking** - Automatically validates all links during build
-- ✅ **GitHub Pages** - Auto-deploys to https://coder.github.io/cmux on push to main
+- ✅ **GitHub Pages** - Auto-deploys to https://cmux.io on push to main
 
 ## Structure