{# @description The page wrapper. #}
{# @prop fill:boolean | description:"Mark the page as wanting the shell's height instead of its content's height." #}
{# @prop gap:number | default:6 | description:"Gap between the page's children." #}
{# @prop class:text | description:"Extra classes appended to the page's root element." #}
{# @slot The page's title, content and other regions. — The page's children. #}