The purpose of this task is to add missing content to the EUI+. **Missing content:** - [x] [EuiEmptyPrompt’s Guidelines](https://eui.elastic.co/#/display/empty-prompt/guidelines) subpage - [x] [EuiToast’s Guidelines](https://eui.elastic.co/#/display/toast/guidelines) subpage - [x] [EuiTour’s Guidelines](https://eui.elastic.co/#/display/tour/guidelines) subpage - [x] [Form controls’ Guidelines](https://eui.elastic.co/#/forms/form-controls/guidelines) subpage - [x] [Selection controls’ Guidelines](https://eui.elastic.co/#/forms/selection-controls/guidelines) subpage
The purpose of this task is to add missing content to the EUI+.
Missing content: