Pull request #3583 by @moy2010 added a new textformat (which is helpful), but if we use HTML to serialize it gets lost because importDOM is not parsing the mark tag in

Also the devtools do not show formatting for this new highlight feature because its mising in

Lexical version: 0.16.1

Steps To Reproduce

1. exportDOM a TextNode with format highlighting
2. importDOM mark does not get parsed back to highligted text.,