docs: add installation instructions to README

Author: timi

README.md

@@ -1,2 +1,41 @@
-# release
-Meland Labs App Release Repo
+# Lumis
+
+Lumis is an AI-powered IM router and chat agent with multi-platform integration.
+
+## Installation
+
+### macOS
+
+#### DMG (Recommended for macOS)
+
+Download the latest release from [GitHub Releases](https://github.com/melandlabs/release/releases).
+
+#### Homebrew
+
+```bash
+# Add tap
+brew tap melandlabs/lumis
+
+# Install
+brew install --cask lumis
+```
+
+### Linux
+
+#### Debian/Ubuntu
+
+```bash
+# Download .deb package from releases
+sudo dpkg -i lumis_*.deb
+sudo apt-get install -f  # Install dependencies
+```
+
+### Windows
+
+#### NSIS Installer
+
+Download the latest release from [GitHub Releases](https://github.com/melandlabs/release/releases).
+
+## Development
+
+This repository contains the CI/CD configuration for building and releasing Lumis. The source code is in the [lumis](https://github.com/melandlabs/lumis) repository.