Add SSH, Claude Code Teams, browser import, custom commands to README (#2445)

* Add SSH, Claude Code Teams, browser import, custom commands to README

* Link cmux.json to docs

* Translate new README features to all 20 languages

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Co-authored-by: Lawrence Chen <lawrencecchen@users.noreply.github.com>

README.md

@@ -63,8 +63,28 @@ Sidebar shows git branch, linked PR status/number, working directory, listening
 <img src="./docs/assets/vertical-horizontal-tabs-and-splits.png" alt="Vertical tabs and split panes" width="100%" />
 </td>
 </tr>
+<tr>
+<td width="40%" valign="middle">
+<h3>SSH</h3>
+<code>cmux ssh user@remote</code> creates a workspace for a remote machine. Browser panes route through the remote network so localhost just works. Drag an image into a remote session to upload via scp.
+</td>
+<td width="60%">
+<img src="./docs/assets/ssh.png" alt="cmux SSH" width="100%" />
+</td>
+</tr>
+<tr>
+<td width="40%" valign="middle">
+<h3>Claude Code Teams</h3>
+<code>cmux claude-teams</code> runs Claude Code's teammate mode with one command. Teammates spawn as native splits with sidebar metadata and notifications. No tmux required.
+</td>
+<td width="60%">
+<img src="./docs/assets/claude-code-teams.png" alt="Claude Code Teams" width="100%" />
+</td>
+</tr>
 </table>
 
+- **Browser import** — Import cookies, history, and sessions from Chrome, Firefox, Arc, and 20+ browsers so browser panes start authenticated
+- **Custom commands** — Define project-specific actions in [`cmux.json`](https://cmux.com/docs/custom-commands) that launch from the command palette
 - **Scriptable** — CLI and socket API to create workspaces, split panes, send keystrokes, and automate the browser
 - **Native macOS app** — Built with Swift and AppKit, not Electron. Fast startup, low memory.
 - **Ghostty compatible** — Reads your existing `~/.config/ghostty/config` for themes, fonts, and colors