Kerebron basic editor extension

Set of basic editor extensions, marks and nodes

Features:

• bold, italic, image, hr...
• basic keymap
• cursors: drop and gap
• history

Usage:

import { ExtensionBasicEditor } from '@kerebron/extension-basic-editor';

this.editor = new CoreEditor({
  element: htmlElement,
  extensions: [
    new ExtensionBasicEditor(),
  ],
});

const buffer = new TextEncoder().encode('# TEST \n\n1.  aaa\n2.  bbb');
await this.editor.loadDocument('text/x-markdown', buffer);

const buffer = await this.editor.saveDocument('text/x-markdown');
const markdown = new TextDecoder().decode(buffer);