refactor: restructure extensions

packages/extension-gapcursor/src/gapcursor.ts

@@ -0,0 +1,20 @@
+import { Extension } from '@tiptap/core'
+import { gapCursor } from 'prosemirror-gapcursor'
+
+const Gapcursor = Extension.create({
+  name: 'gapCursor',
+
+  addProseMirrorPlugins() {
+    return [
+      gapCursor(),
+    ]
+  },
+})
+
+export default Gapcursor
+
+declare module '@tiptap/core' {
+  interface AllExtensions {
+    Gapcursor: typeof Gapcursor,
+  }
+}