refactor: recreate extension exports

packages/extension-italic/src/index.ts

@@ -0,0 +1,5 @@
+import { Italic } from './italic'
+
+export * from './italic'
+
+export default Italic

packages/extension-italic/src/italic.ts

@@ -17,7 +17,7 @@ export const starPasteRegex = /(?:^|\s)((?:\*)((?:[^*]+))(?:\*))/gm
 export const underscoreInputRegex = /(?:^|\s)((?:_)((?:[^_]+))(?:_))$/gm
 export const underscorePasteRegex = /(?:^|\s)((?:_)((?:[^_]+))(?:_))/gm
 
-const Italic = Mark.create({
+export const Italic = Mark.create({
   name: 'italic',
 
   defaultOptions: <ItalicOptions>{
@@ -87,8 +87,6 @@ const Italic = Mark.create({
   },
 })
 
-export default Italic
-
 declare module '@tiptap/core' {
   interface AllExtensions {
     Italic: typeof Italic,