Include Homebrew installation method in README

Added Homebrew installation instructions for ChargeMonitor.

Author: CrashSystemZ

README.md

@@ -37,9 +37,18 @@ Built‑in indicators provide only basic status. ChargeMonitor gathers more cont
   - mapping PID → app by executable path or responsible process.
 
 ## Install & Run
-- Download the latest release from GitHub.
-- Move the app to /Applications.
-- Launch ChargeMonitor — the menu bar will show the battery percentage; click to open the popover.
+  - Using Homebrew:
+  ```bash
+  brew install --cask CrashSystemZ/chargemonitor/chargemonitor
+  ```
+  Homebrew will always install the latest official release.
+  <p>
+    OR
+  </p>
+
+  - Download the latest release from GitHub.
+  - Move the app to /Applications.
+  - Launch ChargeMonitor — the menu bar will show the battery percentage; click to open the popover.
 
 The app runs as an accessory (no Dock icon) and requires no extra permissions.