docs: add release and homebrew badges

Author: brannn

README.md

@@ -2,6 +2,8 @@
 
 [![Go 1.24+](https://img.shields.io/badge/Go-1.24%2B-00ADD8?logo=go&logoColor=white)](./go.mod)
 [![CI](https://github.com/thinkwright/threadmark/actions/workflows/ci.yml/badge.svg)](https://github.com/thinkwright/threadmark/actions/workflows/ci.yml)
+[![Release](https://img.shields.io/github/v/release/thinkwright/threadmark?label=release)](https://github.com/thinkwright/threadmark/releases/latest)
+[![Homebrew](https://img.shields.io/badge/brew%20install-thinkwright%2Ftap%2Fthreadmark-fbb040?logo=homebrew&logoColor=white)](https://github.com/thinkwright/homebrew-tap)
 [![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE)
 [![Status: pre-release](https://img.shields.io/badge/status-pre--release-f59e0b.svg)](#limits)
 [![Adapters: Claude Code + Codex](https://img.shields.io/badge/adapters-Claude%20Code%20%2B%20Codex-4b5563.svg)](#what-it-does)