Bug: highlight TextFormatType is missing in importDOM losing state

[bfritscher]

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

lexical/packages/lexical/src/nodes/LexicalTextNode.ts

Line 552 in 20e4ea1

static importDOM(): DOMConversionMap | null {

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

lexical/packages/lexical-devtools-core/src/generateContent.ts

Line 58 in 20e4ea1

const FORMAT_PREDICATES = [

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.,

[etrepum]

This would be a straightforward PR to write if you were interested, or you could override the importDOM using the html property of your EditorConfig if you needed a solution that would work without upgrading lexical. It doesn't look like any code in the monorepo is using IS_HIGHLIGHT which is likely why it was forgotten here.