Publish spider CLI binaries

[alexkreidler]

Publishing binaries on Github releases would save people from having to build the CLI, which can take a while especially on low-resource devices. Then they can install with cargo-binstall: cargo binstall spider_cli, or by curling the Github releases URL.

A Github action to run cargo build and publish would be pretty quick to setup and very useful. Thanks for an awesome project!

[asymmetric1947]

+1 for this, would help a lot with deployment, especially since it's just a GitHub setting that could be set once and then left alone to run automatically going forward