fix(setup): install gems before running configure (#95)

bin/configure needs activesupport for credential generation. Move
bundle install before bin/configure in bin/setup, and use targeted
gem activation instead of loading the full bundle.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: newstler

bin/configure

@@ -318,7 +318,7 @@ FileUtils.chdir APP_ROOT do
 
   section("Writing credentials")
 
-  require "bundler/setup"
+  gem "activesupport"
   require "active_support/encrypted_configuration"
   FileUtils.mkdir_p("config/credentials")
 

bin/setup

@@ -11,17 +11,17 @@ FileUtils.chdir APP_ROOT do
   # This script is a way to set up or update your development environment automatically.
   # This script is idempotent, so that you can run it at any time and get an expectable outcome.
 
+  puts "== Installing dependencies =="
+  system("bundle check") || system!("bundle install")
+
   # Run configuration wizard if not already configured
   unless File.exist?(".configured")
     system!("bin/configure")
   end
 
-  puts "== Configuring git hooks =="
+  puts "\n== Configuring git hooks =="
   system!("git config core.hooksPath bin/hooks")
 
-  puts "\n== Installing dependencies =="
-  system("bundle check") || system!("bundle install")
-
   puts "\n== Preparing database =="
   system! "bin/rails db:prepare"