Enable installation via homebrew #7

The issue

I don't particularly like installing python scripts locally (pip install .) because of having to keep the code near, potential issues with Python environments...

The solution

I created a Homebrew Formula to allow installing karaml via homebrew. It is in this repo. With that, one can simply

brew tap tonipenya/karaml
brew install karaml

If you look at the formula, it is pulling karaml from a clone I made from your repo. That's only because I needed a release and there was none here :D

Enabling for the official karaml repo

If you are interested on supporting this on your side, simply:

1. Clone the Formula repo. Note that the name of the repo is important for Homebrew.
2. Create a release on the original karaml repo.
3. Replace any references to my repo (i.e. tonipenya) on the actual Formula file for yours (al-ce).
4. Add documentation to your README file

## 📦 Installation
...

### Homebrew
brew tap al-ce/karaml
brew install karaml