docs: update README and CHANGELOG for editor support

Document the addition of VSCodium with Windsurf support and clarify
that the extension now works with multiple editors beyond VS Code.

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <[email protected]>

Author: bcpeinhardt

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Added
+
+- Support for VSCodium with Windsurf via the Windsurf Remote OpenSSH extension
+
 ## [v1.4.2](https://github.com/coder/vscode-coder/releases/tag/v1.4.2) (2025-03-07)
 
 ### Fixed

README.md

@@ -4,14 +4,15 @@
 [!["Join us on
 Discord"](https://badgen.net/discord/online-members/coder)](https://coder.com/chat?utm_source=github.com/coder/vscode-coder&utm_medium=github&utm_campaign=readme.md)
 
-The Coder Remote VS Code extension lets you open
+The Coder Remote extension lets you open
 [Coder](https://github.com/coder/coder) workspaces with a single click.
 
 - Open workspaces from the dashboard in a single click.
 - Automatically start workspaces when opened.
-- No command-line or local dependencies required - just install VS Code!
+- No command-line or local dependencies required - just install your editor!
 - Works in air-gapped or restricted networks. Just connect to your Coder
   deployment!
+- Supports multiple editors: VS Code, Cursor, and Windsurf.
 
 ![Demo](https://github.com/coder/vscode-coder/raw/main/demo.gif?raw=true)