1. Add English language.
2. Macro definition supports asynchronous expressions.
3. Support quoting other document fragments in the document.
4. Fine-tune the UI.
5. Plug-in development:
   • Added service ctx.i18n.
   • Added method ctx.view.render.
   • Rename the hook VIEW_REFRESH to VIEW_AFTER_REFRESH.
   • Added hooks.
     • I18N_CHANGE_LANGUAGE
     • SETTING_FETCHED
     • SETTING_BEFORE_WRITE
     • VIEW_BEFORE_REFRESH