📝 Update documentation for brew and zb cheat sheets

brew/CHEATSHEET.md

@@ -9,3 +9,18 @@ repo: https://github.com/Homebrew/brew
 description: 🍺 The missing package manager for macOS (or Linux)
 ```
 
+## Install
+
+```shell
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+```
+
+## Usage
+
+Dir: `/opt/homebrew`
+
+Install `wget`:
+```shell
+brew install wget
+```
+