refactor: recreate extension exports

packages/extension-text/src/index.ts

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

packages/extension-text/src/text.ts

@@ -1,12 +1,10 @@
 import { Node } from '@tiptap/core'
 
-const Text = Node.create({
+export const Text = Node.create({
   name: 'text',
   group: 'inline',
 })
 
-export default Text
-
 declare module '@tiptap/core' {
   interface AllExtensions {
     Text: typeof Text,