Update index file to support isolatedModules

Author: bekatru

src/index.ts

@@ -1,20 +1,20 @@
-export { HeaderButtonsComponentType } from './HeaderButtonComponentContext';
+export { type HeaderButtonsComponentType } from './HeaderButtonComponentContext';
 export {
   HeaderButton,
   defaultRenderVisibleButton,
   type ItemProps,
   type HeaderButtonProps,
   type VisibleButtonProps,
 } from './HeaderButton';
-export { HeaderButtons, HeaderButtonsProps } from './HeaderButtons';
+export { HeaderButtons, type HeaderButtonsProps } from './HeaderButtons';
 export {
   defaultOnOverflowMenuPress,
   overflowMenuPressHandlerActionSheet,
   overflowMenuPressHandlerPopupMenu,
   overflowMenuPressHandlerDropdownMenu,
   extractOverflowButtonData,
   extractHiddenItemProps,
-  OnOverflowMenuPressParams,
+  type OnOverflowMenuPressParams,
 } from './overflowMenu/overflowMenuPressHandlers';
 export { Item, HiddenItem, type HiddenItemProps } from './HeaderItems';
 export { useOverflowMenu } from './overflowMenu/OverflowMenuContext';