Update autoload configuration

Move ignored lib directories into the `autoload_lib` config.

config/application.rb

@@ -33,7 +33,18 @@ class Application < Rails::Application
     # Please, add to the `ignore` list any other `lib` subdirectories that do
     # not contain `.rb` files, or that should not be reloaded or eager loaded.
     # Common ones are `templates`, `generators`, or `middleware`, for example.
-    config.autoload_lib(ignore: %w(assets tasks))
+    config.autoload_lib(
+      ignore: %w(
+        acts_as_xapian
+        assets
+        core_ext
+        custom_cops
+        generators
+        has_tag_string
+        tasks
+        themes
+      )
+    )
 
     # Configuration for the application, engines, and railties goes here.
     #

config/initializers/zeitwerk.rb

@@ -9,13 +9,8 @@
 )
 
 Rails.autoloaders.main.ignore(
-  "lib/acts_as_xapian",
   "lib/confidence_intervals.rb",
   "lib/configuration.rb",
-  "lib/core_ext",
-  "lib/custom_cops",
-  "lib/generators",
-  "lib/has_tag_string",
   "lib/i18n_fixes.rb",
   "lib/languages.rb",
   "lib/mail_handler/backends/mail_extensions.rb",
@@ -25,6 +20,5 @@
   "lib/routing_filters.rb",
   "lib/stripe_mock_patch.rb",
   "lib/theme.rb",
-  "lib/themes",
   "lib/use_spans_for_errors.rb"
 )