feat: add SettingWidget::dropdown support for int style enums (#6303)

src/common/ChatterinoSetting.hpp

@@ -62,6 +62,9 @@ using StringSetting = ChatterinoSetting<std::string>;
 using QStringSetting = ChatterinoSetting<QString>;
 using QSizeSetting = ChatterinoSetting<QSize>;
 
+/// Accepts any enum and saves the enum value as an integer
+///
+/// e.g. for enum class {Foo = 2, Bar = 6}, Foo would be saved as 2 and Bar would be saved as 6
 template <typename Enum>
 class EnumSetting : public ChatterinoSetting<std::underlying_type_t<Enum>>
 {