docs: add Download section with v1.0.0 release link

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -5,6 +5,15 @@ A native macOS system monitor application built with SwiftUI. TopManager provide
 ![macOS](https://img.shields.io/badge/macOS-13.0+-blue)
 ![Swift](https://img.shields.io/badge/Swift-5.9-orange)
 ![License](https://img.shields.io/badge/License-GPL--3.0-green)
+![Release](https://img.shields.io/badge/release-v1.0.0-brightgreen)
+
+## Download
+
+**[⬇️ Download TopManager 1.0 (.dmg)](https://github.com/hariel1985/TopManager/releases/latest)**
+
+Signed with a Developer ID and **notarized by Apple** — it opens without Gatekeeper
+warnings. Open the DMG and drag TopManager to your Applications folder.
+All [releases](https://github.com/hariel1985/TopManager/releases).
 
 ## Screenshots