adding brew installer for labeler

brew/.gitignore

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+# Mac trash
+.DS_Store

brew/Formula/labeler.rb

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+class Labeler < Formula
+    desc "Utility that automates the labeling of resources output from kubectl, kustomize, and helm"
+    homepage "https://github.com/clubanderson/labeler"
+    url "https://github.com/clubanderson/labeler/releases/download/v0.1.0/labeler-v0.1.0.tar.gz"
+    sha256 "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
+
+    def install
+      bin.install "labeler"
+    end
+
+    test do
+      system "#{bin}/labeler", "--version"
+    end
+  end

brew/README.md

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+## Instructions for installing the Labeler using Brew package manager
+
+install brew:
+```
+    https://brew.sh
+```
+
+to install:
+```
+    brew tap clubanderson/labeler
+    brew install labeler
+```
+
+to remove: 
+```
+    brew remove labeler
+    brew untap clubanderson/labeler
+```