add ordered list and list item

docs/src/demos/Extensions/ListItem/index.spec.js

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+context('/api/extensions/list-item', () => {
+  before(() => {
+    cy.visit('/api/extensions/list-item')
+  })
+})

docs/src/demos/Extensions/ListItem/index.vue

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+<template>
+  <div v-if="editor">
+    <button @click="editor.chain().focus().bulletList().run()" :class="{ 'is-active': editor.isActive('bullet_list') }">
+      bullet list
+    </button>
+    <button @click="editor.chain().focus().orderedList().run()" :class="{ 'is-active': editor.isActive('ordered_list') }">
+      ordered list
+    </button>
+
+    <editor-content :editor="editor" />
+  </div>
+</template>
+
+<script>
+import { Editor } from '@tiptap/core'
+import { EditorContent } from '@tiptap/vue'
+import Document from '@tiptap/extension-document'
+import Paragraph from '@tiptap/extension-paragraph'
+import Text from '@tiptap/extension-text'
+import BulletList from '@tiptap/extension-bullet-list'
+import OrderedList from '@tiptap/extension-ordered-list'
+import ListItem from '@tiptap/extension-list-item'
+
+export default {
+  components: {
+    EditorContent,
+  },
+
+  data() {
+    return {
+      editor: null,
+    }
+  },
+
+  mounted() {
+    this.editor = new Editor({
+      extensions: [
+        Document(),
+        Paragraph(),
+        Text(),
+        BulletList(),
+        OrderedList(),
+        ListItem(),
+      ],
+      content: `
+        <p>
+          I like lists. Let’s add one:
+        </p>
+        <ul>
+          <li>This is a bullet list.</li>
+          <li>And it has three list items.</li>
+          <li>Here is the third one.</li>
+        </ul>
+        <p>
+          Do you want to see one more? I bet! Here is another one:
+        </p>
+        <ol>
+          <li>That’s a different list, actually it’s an ordered list.</li>
+          <li>It also has three list items.</li>
+          <li>And all of them are numbered.</li>
+        </ol>
+        <p>
+          Lists would be nothing without list items.
+        </p>
+      `,
+    })
+  },
+
+  beforeDestroy() {
+    this.editor.destroy()
+  }
+}
+</script>

docs/src/demos/Extensions/OrderedList/index.spec.js

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+context('/api/extensions/ordered-list', () => {
+  before(() => {
+    cy.visit('/api/extensions/ordered-list')
+  })
+
+  beforeEach(() => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.setContent('<p>Example Text</p>')
+      editor.selectAll()
+    })
+  })
+
+  it('the button should make the selected line a ordered list item', () => {
+    cy.get('.ProseMirror ol')
+      .should('not.exist')
+
+    cy.get('.ProseMirror ol li')
+      .should('not.exist')
+
+    cy.get('.demo__preview button:nth-child(1)')
+      .click()
+
+    cy.get('.ProseMirror')
+      .find('ol')
+      .should('contain', 'Example Text')
+
+    cy.get('.ProseMirror')
+      .find('ol li')
+      .should('contain', 'Example Text')
+  })
+
+  it('the button should toggle the ordered list', () => {
+    cy.get('.ProseMirror ol')
+      .should('not.exist')
+
+    cy.get('.demo__preview button:nth-child(1)')
+      .click()
+
+    cy.get('.ProseMirror')
+      .find('ol')
+      .should('contain', 'Example Text')
+
+    cy.get('.demo__preview button:nth-child(1)')
+      .click()
+
+    cy.get('.ProseMirror ol')
+      .should('not.exist')
+  })
+
+  it('should leave the list with double enter', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.clearContent()
+    })
+
+    cy.get('.ProseMirror')
+      .type('1. List Item 1{enter}{enter}Paragraph')
+
+    cy.get('.ProseMirror')
+      .find('li')
+      .its('length')
+      .should('eq', 1)
+
+    cy.get('.ProseMirror')
+      .find('p')
+      .should('contain', 'Paragraph')
+  })
+
+  it('should make a ordered list from a number', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.clearContent()
+    })
+
+    cy.get('.ProseMirror')
+      .type('1. List Item 1{enter}List Item 2')
+
+    cy.get('.ProseMirror')
+      .find('li:nth-child(1)')
+      .should('contain', 'List Item 1')
+
+    cy.get('.ProseMirror')
+      .find('li:nth-child(2)')
+      .should('contain', 'List Item 2')
+  })
+
+  it('should remove the ordered list after pressing backspace', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.clearContent()
+    })
+
+    cy.get('.ProseMirror')
+      .type('1. {backspace}Example')
+
+    cy.get('.ProseMirror')
+      .find('p')
+      .should('contain', '1. Example')
+  })
+})

docs/src/demos/Extensions/OrderedList/index.vue

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+<template>
+  <div v-if="editor">
+    <button @click="editor.chain().focus().orderedList().run()" :class="{ 'is-active': editor.isActive('ordered_list') }">
+      ordered list
+    </button>
+
+    <editor-content :editor="editor" />
+  </div>
+</template>
+
+<script>
+import { Editor } from '@tiptap/core'
+import { EditorContent } from '@tiptap/vue'
+import Document from '@tiptap/extension-document'
+import Paragraph from '@tiptap/extension-paragraph'
+import Text from '@tiptap/extension-text'
+import OrderedList from '@tiptap/extension-ordered-list'
+import ListItem from '@tiptap/extension-list-item'
+
+export default {
+  components: {
+    EditorContent,
+  },
+
+  data() {
+    return {
+      editor: null,
+    }
+  },
+
+  mounted() {
+    this.editor = new Editor({
+      extensions: [
+        Document(),
+        Paragraph(),
+        Text(),
+        OrderedList(),
+        ListItem(),
+      ],
+      content: `
+        <ul>
+          <li>A list item</li>
+          <li>And another one</li>
+        </ul>
+      `,
+    })
+  },
+
+  beforeDestroy() {
+    this.editor.destroy()
+  }
+}
+</script>