Add --reset option to bin/setup (rails#54952)

Makes it easier to zero out a database and load seeds during
development.

Author: dhh

railties/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Add --reset option to bin/setup which will call db:reset as part of the setup.
+
+    *DHH*
+
 *   Add RuboCop cache restoration to RuboCop job in GitHub Actions workflow templates.
 
     *Lovro Bikić*

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

@@ -31,6 +31,7 @@ FileUtils.chdir APP_ROOT do
 
   puts "\n== Preparing database =="
   system! "bin/rails db:prepare"
+  system! "bin/rails db:reset" if ARGV.include?("--reset")
 <% end -%>
 
   puts "\n== Removing old logs and tempfiles =="