adding skeleton for brew

packages/brew/gocatcli.rb

@@ -0,0 +1,18 @@
+class Gocatcli < Formula
+  desc "Command-line catalog tool for your offline data"
+  homepage "https://github.com/deadc0de6/gocatcli"
+  url "https://github.com/deadc0de6/gocatcli/archive/refs/tags/v1.0.3.tar.gz"
+  sha256 "0011a3a65ab6e894b12de7e55cb33d413a590a3e7c422af30e83ba94d28476b4"
+  license "GPL-3.0"
+
+  depends_on "go" => :build
+
+  def install
+    system "make", "build"
+    bin.install "bin/gocatcli"
+  end
+
+  test do
+    assert_match "gocatcli version #{version}", shell_output("#{bin}/gocatcli --version")
+  end
+end