homebrew: add type for install (formula or cask)

[zmughal]

Default to formula.

For casks, use

brew cask install <package-name>

More homebrew CLI syntax.

• https://apple.stackexchange.com/questions/145437/where-can-i-find-the-installed-package-path-via-brew
• https://discourse.brew.sh/t/desire-to-add-x11-support-back-into-imagemagick/4158/11
• <https://github.com/Homebrew/homebrew-core/ issues/31510>
  • https://discourse.brew.sh/t/maintaining-a-tap-to-provide-options-for-a-formula/3871/19