Declarative Package Management With Homebrew

Homebrew provides declarative package management through the brew bundle command with the --cleanup flag.

If a Brewfile contains packages:

`{3}txt cask "firefox" cask "ghostty" cask "proton-mail" cask "zed" cargo "cargo-audit" cargo "cargo-nextest" cargo "cargo-watch"

When:

```bash
brew bundle install --cleanup --file=Brewfile

Then all packages declared in the file will be installed. The --cleanup flag ensures that packages removed from the Brewfile are also uninstalled from your system.