Build cli release binaries for linux

[jakedahn]

It would be cool if we had release binaries for Linux. At the moment, we only have a streamlined solution for installing the Replicate CLI on MacOS with Homebrew.

brew tap replicate/tap
brew install replicate

If you are on LInux, the only way to install the CLI is to clone the code, install the right version of golang, and build the binary yourself -- which would be a deal breaker for me if I were a Linux user.