Add bin/dev by default (rails#52433)

* Add bin/dev by default

Then we have a uniform way of starting dev mode whether someone is using
jsbundling or importmaps.

* Also generated here

Author: dhh

railties/lib/rails/generators/rails/app/templates/bin/dev.tt

@@ -0,0 +1 @@
+exec "./bin/rails", "server", *ARGV

railties/test/generators/api_app_generator_test.rb

@@ -141,6 +141,7 @@ def default_files
         app/views/layouts
         app/views/layouts/mailer.html.erb
         app/views/layouts/mailer.text.erb
+        bin/dev
         bin/docker-entrypoint
         bin/rails
         bin/rake

railties/test/generators/app_generator_test.rb

@@ -32,6 +32,7 @@
   app/views/pwa/manifest.json.erb
   app/views/pwa/service-worker.js
   bin/brakeman
+  bin/dev
   bin/docker-entrypoint
   bin/rails
   bin/rake

railties/test/generators/plugin_generator_test.rb

@@ -39,6 +39,7 @@
   test/dummy/app/views/layouts/mailer.text.erb
   test/dummy/app/views/pwa/manifest.json.erb
   test/dummy/app/views/pwa/service-worker.js
+  test/dummy/bin/dev
   test/dummy/bin/rails
   test/dummy/bin/rake
   test/dummy/bin/setup