Add release documentation

Document the release process and how to run releases with pnpm run release.

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

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

Author: cbh123

RELEASING.md

@@ -0,0 +1,36 @@
+# Releasing Chorus
+
+## Quick Start
+
+To release a new version of Chorus:
+
+```bash
+pnpm run release
+```
+
+That's it!
+
+## What Happens
+
+The release script (`script/release.sh`) does the following:
+
+1. Runs TypeScript compilation to check for errors
+2. Checks out `main` and pulls the latest changes
+3. Checks out the `release` branch
+4. Pulls `main` into `release` (fast-forward merge)
+5. Pushes `release` to GitHub
+6. Switches back to `main`
+
+Once the `release` branch is pushed, GitHub Actions automatically:
+
+1. Creates a draft release on CrabNebula Cloud
+2. Builds the app for both Intel (`x86_64`) and Apple Silicon (`aarch64`) Macs
+3. Signs and notarizes the app with Apple
+4. Uploads the build artifacts to CrabNebula Cloud
+5. Sends a Slack notification when complete
+
+## Monitoring
+
+Check release status at: https://github.com/meltylabs/chorus-oss/actions
+
+Download releases at: https://web.crabnebula.cloud/chorus/chorus