The existing instructions is perhaps not clear enough:
To add Homebrew to your `PATH` run `brew shellenv` in your shell
profile (e.g. `~/.bash_profile` or `~/.zprofile`)
Fixes#16803.
- use the system font instead of Helvetica
- cleanup font definitions
- add extra newline to `CONCLUSION.rtf` to next steps not showing up
without a click
- add actual hyperlinks to `CONCLUSION.rtf`
Fixes#15793
- don't include GitHub Actions credentials
- generate and include RTF version of Homebrew BSD license
- create nicer installer with `productbuild`
- customise welcome/conclusion messages
- add Homebrew logo as a background image
- remove unnecessary `preinstall` script
- cleanup `postinstall` script to pass `brew doctor`
- use `Distribution.xml` for a nicer installer
- require CLT or Xcode rather than using our hacks to try and install
CLT during installation
