i18n: Add exception classes (#448)

Co-authored-by: Masataka Pocke Kuwabara <[email protected]>

gems/i18n/1.10/i18n.rbs

@@ -78,4 +78,40 @@ module I18n
     def self.deep_symbolize_keys: (Hash[untyped, untyped] hash) -> Hash[Symbol, untyped]
     def self.deep_symbolize_keys_in_object: (untyped value) -> untyped
   end
+
+  class ArgumentError < ::ArgumentError
+  end
+
+  class Disabled < ArgumentError
+  end
+
+  class InvalidLocale < ArgumentError
+  end
+
+  class InvalidLocaleData < ArgumentError
+  end
+
+  class MissingTranslation < ArgumentError
+  end
+
+  class MissingTranslationData < ArgumentError
+  end
+
+  class InvalidPluralizationData < ArgumentError
+  end
+
+  class MissingInterpolationArgument < ArgumentError
+  end
+
+  class ReservedInterpolationKey < ArgumentError
+  end
+
+  class UnknownFileType < ArgumentError
+  end
+
+  class UnsupportedMethod < ArgumentError
+  end
+
+  class InvalidFilenames < ArgumentError
+  end
 end