Show progress when reloading the Rails application (#563)

One of the slowest parts of DSL RBI generation in the Tapioca add-on is actually the fact that we're reloading the Rails app.

In addition to adding progress notifications there, let's also show the progress of reloading the app, so that the user knows what's going on.

Author: vinistock

lib/ruby_lsp/ruby_lsp_rails/server.rb

@@ -258,8 +258,10 @@ def execute(request, params)
             send_result(run_migrations)
           end
         when "reload"
-          with_notification_error_handling(request) do
-            ::Rails.application.reloader.reload!
+          with_progress("rails-reload", "Reloading Ruby LSP Rails instance") do
+            with_notification_error_handling(request) do
+              ::Rails.application.reloader.reload!
+            end
           end
         when "route_location"
           with_request_error_handling(request) do