Add homebrew to environment if installed (arm or intel)

.zshrc

# remove /usr/local/bin from /etc/paths
export PATH="$PATH:s/\/usr\/local\/bin://"

# add homebrew to environment
if [ -x /usr/local/bin/brew ]
then
        eval "$(/usr/local/bin/brew shellenv)"
elif [ -x /opt/homebrew/bin/brew ]
then
        export PATH="/usr/local/bin:/usr/local/sbin${PATH+:$PATH}"
        eval "$(/opt/homebrew/bin/brew shellenv)"
else
        export PATH="/usr/local/bin:/usr/local/sbin${PATH+:$PATH}"
fi