Update README tagline to list supported AI CLIs

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: wesm

README.md

@@ -1,6 +1,6 @@
 # roborev
 
-Automatic code review for git commits using AI agents.
+Automatic code review for git commits using AI agents. Supports Claude Code, Codex, Copilot, and Gemini CLIs for code reviews.
 
 ![TUI Queue View](docs/screenshots/tui-queue.png)