Add mac_setup script.

.gitignore

@@ -29,3 +29,4 @@ java/server/src/main/resources/*.so
 java/server/src/main/resources/*.dll
 
 .DS_Store
+Brewfile.lock.json

bin/mac_setup.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+#set -ex
+
+cat << EOF | brew bundle install --file=-
+tap "homebrew/bundle"
+brew "awscli"
+brew "cmake"
+brew "coreutils"
+brew "fnm"
+brew "git"
+brew "jq"
+brew "just"
+brew "protobuf"
+brew "python"
+brew "rocksdb"
+brew "ruby"
+brew "rustup"
+brew "shellcheck"
+brew "swiftformat"
+brew "swiftlint"
+brew "taplo"
+brew "terraform"
+brew "yamllint"
+cask "google-cloud-sdk"
+EOF