Add binstubs for rake and setup

Author: elia

bin/rake

@@ -0,0 +1,7 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("rake", "rake")

bin/setup

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+gem install bundler --conservative
+
+bundle update