Adds [ruby-lsp](https://shopify.github.io/ruby-lsp/) as an alternative LS for Ruby language. While support for fully functional `ruby-lsp` is limited due to some limitations (see https://github.com/zed-industries/zed/pull/8613) I think it's OK to add it but disable by default. Thanks! Resolves #4834. Release Notes: - N/A ### Some screenshots Completion support  Symbol search  --------- Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>