add README

Author: thiagowfx

Formula/README.md

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+# Formula
+
+## Description
+
+This project contains the [homebrew](https://brew.sh/) formula for `pancake`.
+
+## Installation
+
+To install `pancake` using this formula, first ensure you have Homebrew
+installed. Then, tap this repository and install `pancake`:
+
+```shell
+brew tap thiagowfx/pancake https://github.com/thiagowfx/pancake.git
+brew install --HEAD pancake
+```
+
+## Usage
+
+After installation, all scripts end up in the homebrew `bin/` directory, which
+should already be in your `$PATH`.
+
+Use `brew ls pancake` to list them all.