refactor: Enhance unit test helpers loading

This commit refactors the way we load unit test helpers. Instead of
requiring each file individually, we now have a single file that
requires all of them. This makes it easier to add new helpers and
ensures that they are loaded in the correct order.

spec/support/unit/configuration.rb

@@ -0,0 +1,24 @@
+module UnitTests
+  class Configuration
+    CLASSES = [
+      UnitTests::ActiveModelHelpers,
+      UnitTests::ActiveModelVersions,
+      UnitTests::ActiveModelVersions,
+      UnitTests::ActiveRecordVersions,
+      UnitTests::ClassBuilder,
+      UnitTests::ColumnTypeHelpers,
+      UnitTests::ControllerBuilder,
+      UnitTests::DatabaseHelpers,
+      UnitTests::I18nFaker,
+      UnitTests::MailerBuilder,
+      UnitTests::MessageHelpers,
+      UnitTests::ModelBuilder,
+      UnitTests::RailsVersions,
+      UnitTests::ValidationMatcherScenarioHelpers,
+    ].freeze
+
+    def self.configure_example_groups(config)
+      CLASSES.each { |klass| klass.configure_example_group(config) }
+    end
+  end
+end

spec/unit_spec_helper.rb

@@ -1,4 +1,5 @@
 require_relative 'support/unit/load_environment'
+require_relative 'support/unit/configuration'
 
 require 'rspec/rails'
 require 'rspec/matchers/fail_matchers'
@@ -15,21 +16,7 @@
 RSpec.configure do |config|
   config.include RSpec::Matchers::FailMatchers
 
-  UnitTests::ActionPackVersions.configure_example_group(config)
-  UnitTests::ActiveModelHelpers.configure_example_group(config)
-  UnitTests::ActiveModelVersions.configure_example_group(config)
-  UnitTests::ClassBuilder.configure_example_group(config)
-  UnitTests::ControllerBuilder.configure_example_group(config)
-  UnitTests::I18nFaker.configure_example_group(config)
-  UnitTests::MailerBuilder.configure_example_group(config)
-  UnitTests::ModelBuilder.configure_example_group(config)
-  UnitTests::RailsVersions.configure_example_group(config)
-  UnitTests::ActiveRecordVersions.configure_example_group(config)
-  UnitTests::ActiveModelVersions.configure_example_group(config)
-  UnitTests::DatabaseHelpers.configure_example_group(config)
-  UnitTests::ColumnTypeHelpers.configure_example_group(config)
-  UnitTests::ValidationMatcherScenarioHelpers.configure_example_group(config)
-  UnitTests::MessageHelpers.configure_example_group(config)
+  UnitTests::Configuration.configure_example_group(config)
 
   config.include UnitTests::Matchers