Add homebrew requirements

[timur-harin]

@yegor256

In this pull request, I have added a new file named brew-requirements.txt which contains a list of packages that are required for this repository to function properly on macOS. This file is specifically designed for macOS users who want to install all the necessary packages using Homebrew.

[yegor256]

@timur-harin maybe it's better modify our install.sh script to make it understand the presence of brew and use to install dependencies?

[timur-harin]

@yegor256
Do you mean?

if command -v brew &> /dev/null
then
    echo "Homebrew is installed."
else
    echo "Homebrew is not installed."
fi

[yegor256]

@timur-harin yes, something like this. Currently, in our script, we check for Linux. If it's linux, we try apt-get install. We can also check for macOS and run brew install if it's Mac and homebrew is present.

[timur-harin]

Continue in PR #337