Add Homebrew installation

[mieubrisse]

Major benefit here: allows easily back up all homebrew installs in case your machine dies.

[engfragui]

💭 Assigning to @scottlovegrove for the future so that we don't accidentally put it in our weekly housekeeping rotation (which it's not a good fit).

[bhean]

This could be great!

[scottlovegrove]

We are actively looking into it.