A pure preview component is needed

[wojiaoxiaomayun]

Currently, it can be obtained through getHtml and getCss, but content that is dynamically rendered cannot be exported. A pure preview panel is needed, rather than :preview, to directly render projectData into a displayable page, with effects similar to canvas, but without various events. In this way, all rendered plugins can be used, and the page can be displayed through a url, exactly the same as canvas preview