add hardbreak commands

docs/src/demos/Examples/Basic/index.vue

@@ -55,7 +55,7 @@
       <button @click="editor.chain().focus().horizontalRule().run()">
         horizontal rule
       </button>
-      <button @click="editor.chain().focus().hardBreak().run()">
+      <button @click="editor.chain().focus().setHardBreak().run()">
         hard break
       </button>
       <button @click="editor.chain().focus().undo().run()">

docs/src/demos/Examples/CollaborativeEditing/index.vue

@@ -55,7 +55,7 @@
       <button @click="editor.chain().focus().horizontalRule().run()">
         horizontal rule
       </button>
-      <button @click="editor.chain().focus().hardBreak().run()">
+      <button @click="editor.chain().focus().setHardBreak().run()">
         hard break
       </button>
       <button @click="editor.chain().focus().undo().run()">

docs/src/demos/Examples/CollaborativeEditingWs/index.vue

@@ -55,7 +55,7 @@
       <button @click="editor.chain().focus().horizontalRule().run()">
         horizontal rule
       </button>
-      <button @click="editor.chain().focus().hardBreak().run()">
+      <button @click="editor.chain().focus().setHardBreak().run()">
         hard break
       </button>
       <button @click="editor.chain().focus().undo().run()">

docs/src/demos/Nodes/HardBreak/index.vue

@@ -1,6 +1,6 @@
 <template>
   <div v-if="editor">
-    <button @click="editor.chain().focus().hardBreak().run()">
+    <button @click="editor.chain().focus().setHardBreak().run()">
       hardBreak
     </button>