v0.19.1

Added

• Your coding agent can create your app on rubynative.com. Run ruby_native link --new --name="App name" --url=https://example.com, or let the ship prompt do it, instead of filling in Create your app.
• Your coding agent gets the preview ready before handing it to you. It installs cloudflared and checks your Rails server, so all that's left is running ruby_native preview and scanning.
• ruby_native preview offers to install cloudflared when it's missing. Needs Homebrew.