README.md 추가

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

+# Homebrew Tap - PlatyHouse
+
+PlatyHouse apps via [Homebrew](https://brew.sh).
+
+## Install
+
+```bash
+brew tap platyhouse/tap https://gitlab.platyhouse.com/platyhouse/homebrew-tap.git
+brew install --cask platygrabmouse
+```
+
+## Available Casks
+
+| App | Description |
+|---|---|
+| `platygrabmouse` | Right-click drag to scroll on macOS |
+
+## Update
+
+```bash
+brew upgrade --cask platygrabmouse
+```
+
+## Uninstall
+
+```bash
+brew uninstall --cask platygrabmouse
+brew untap platyhouse/tap
+```
+
+## Contact
+
+- Website: [platyhouse.com](https://platyhouse.com)
+- Email: [apps@platyhouse.com](mailto:apps@platyhouse.com)