feat: add iKeyMon cask

Casks/ikeymon.rb

@@ -0,0 +1,13 @@
+cask "ikeymon" do
+  version "26.1.5"
+  sha256 "a8b1d4ae116bd854d1ed50491233359962c6627f2e65abdaf72016ab79850bd3"
+
+  url "https://git.24unix.net/tracer/iKeyMon/releases/download/v#{version}/iKeyMon-#{version}.dmg"
+  name "iKeyMon"
+  desc "KeyHelp server monitor for macOS"
+  homepage "https://git.24unix.net/tracer/iKeyMon"
+
+  auto_updates true
+
+  app "iKeyMon.app"
+end

README.md

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+# 24unix Homebrew Tap
+
+This tap provides the `ikeymon` cask for installing iKeyMon with Homebrew.
+
+## Add the tap
+
+```bash
+brew tap 24unix/tap https://git.24unix.net/24unix/homebrew-tap.git
+```
+
+## Install
+
+```bash
+brew install --cask ikeymon
+```
+
+## Current upstream release source
+
+The cask downloads signed release artifacts from:
+
+```text
+https://git.24unix.net/tracer/iKeyMon/releases
+```
+