Add initial collections editor page (#37643)

app/javascript/mastodon/components/form_fields/index.ts

@@ -1,3 +1,4 @@
 export { TextInputField } from './text_input_field';
 export { TextAreaField } from './text_area_field';
+export { ToggleField, PlainToggleField } from './toggle_field';
 export { SelectField } from './select_field';