Direct links for per-platform downloads

Right now we can direct users to

https://company-name.moonbase.sh/download/product-name and they can see all the download options available for the latest published version, but it would be nice if there were similar platform-specific links for direct downloads.

For example:

https://company-name.moonbase.sh/download/product-name/linux

https://company-name.moonbase.sh/download/product-name/macos

https://company-name.moonbase.sh/download/product-name/windows