add Commands interface

packages/core/src/commands/selectAll.ts

@@ -1,9 +1,15 @@
 import { selectAll as originalSelectAll } from 'prosemirror-commands'
-import { Command } from '../types'
+import { Command, Commands } from '../types'
 
 /**
  * Select the whole document.
  */
-export const selectAll = (): Command => ({ state, dispatch }) => {
+export const selectAll: Commands['selectAll'] = () => ({ state, dispatch }) => {
   return originalSelectAll(state, dispatch)
 }
+
+declare module '@tiptap/core' {
+  interface Commands {
+    selectAll: () => Command,
+  }
+}