Add dictionary artifact

Library/Homebrew/cask/lib/hbc/artifact.rb

Library/Homebrew/cask/lib/hbc/artifact/dictionary.rb

Library/Homebrew/cask/lib/hbc/cli.rb

Library/Homebrew/cask/lib/hbc/cli/internal_stanza.rb

Library/Homebrew/cask/lib/hbc/dsl.rb

Library/Homebrew/cask/lib/hbc/locations.rb

Library/Homebrew/cask/test/cask/cli/options_test.rb

Library/Homebrew/manpages/brew-cask.1.md

completions/zsh/_brew_cask

manpages/brew-cask.1