Add debug + irb gems to assist with debugging in development and tests (#27960)

Gemfile

@@ -9,6 +9,9 @@ gem 'sprockets', '~> 3.7.2'
 gem 'thor', '~> 1.2'
 gem 'rack', '~> 2.2.7'
 
+# For why irb is in the Gemfile, see: https://ruby.social/@st0012/111444685161478182
+gem 'irb', '~> 1.8'
+
 gem 'haml-rails', '~>2.0'
 gem 'pg', '~> 1.5'
 gem 'pghero'
@@ -179,6 +182,9 @@ group :development do
 end
 
 group :development, :test do
+  # Interactive Debugging tools
+  gem 'debug', '~> 1.8'
+
   # Profiling tools
   gem 'memory_profiler', require: false
   gem 'ruby-prof', require: false

Gemfile.lock

@@ -220,6 +220,9 @@ GEM
       database_cleaner-core (~> 2.0.0)
     database_cleaner-core (2.0.1)
     date (3.3.4)
+    debug (1.8.0)
+      irb (>= 1.5.0)
+      reline (>= 0.3.1)
     debug_inspector (1.1.0)
     devise (4.9.3)
       bcrypt (~> 3.0)
@@ -851,6 +854,7 @@ DEPENDENCIES
   concurrent-ruby
   connection_pool
   database_cleaner-active_record
+  debug (~> 1.8)
   devise (~> 4.9)
   devise-two-factor (~> 4.1)
   devise_pam_authenticatable2 (~> 9.2)
@@ -876,6 +880,7 @@ DEPENDENCIES
   httplog (~> 1.6.2)
   i18n-tasks (~> 1.0)
   idn-ruby
+  irb (~> 1.8)
   json-ld
   json-ld-preloaded (~> 3.2)
   json-schema (~> 4.0)