add osc-cost brew package

Formula/osc-cost.rb

@@ -0,0 +1,31 @@
+class OscCost < Formula
+    desc "osc-cost allows Outscale users to estimate their cloud costs."
+    homepage "https://github.com/outscale/osc-cost"
+    url "https://github.com/outscale/osc-cost/releases/download/v0.3.2/osc-cost-v0.3.2-x86_64-unknown-linux-musl"
+    sha256 "19251816d6f49ada7e6d371cc38232e29cd6300041df5d01216090b27ee8a0c9"
+
+    license "BSD-3-Clause"
+    version "0.1.3"
+
+    def install
+      bin.install "osc-cost"
+      chmod 0777, "osc-cost" 
+      completions = prefix/"contrib/completions"
+      bash_completion_file = "contrib/completions/bash/osc-cost-completion.bash"
+      zsh_completion_file = "#{completions}/zsh/osc-cost-completion.zsh"
+      system "mkdir -p #{completions}/bash/"
+      system "mkdir -p #{completions}/zsh/"
+      system "cp", bash_completion_file, "#{completions}/bash/" if File.exist?(bash_completion_file)
+      system "sh", "-c", <<~EOS 
+        echo 'autoload bashcompinit' > #{zsh_completion_file}
+        echo 'bashcompinit' >> #{zsh_completion_file}
+        echo 'source #{completions}/bash/osc-cost-completion.bash' >> #{zsh_completion_file}
+      EOS
+    end
+
+    test do
+      assert_match "osc-cost", shell_output("#{bin}/osc-cost")
+    end
+  end
+
+