Mention extension for the remirror wysiwyg editor
npm install @remirror/extension-mention 
Add mention and suggesters support to remirror.
``bash`
yarn add @remirror/extension-mention # yarn
pnpm add @remirror/extension-mention # pnpm
npm install @remirror/extension-mention # npm
This is included by default when you install the recommended remirror package. All exports are also available via the entry-point, remirror/extensions`.