Add Split gem with dashboard route

Author: matt-bernhardt

Gemfile

@@ -16,6 +16,7 @@ gem 'rails', '~> 7.2.0'
 gem 'redis'
 gem 'sentry-rails'
 gem 'sentry-ruby'
+gem 'split', require: 'split/dashboard'
 gem 'sprockets-rails'
 gem 'stimulus-rails'
 gem 'turbo-rails'